Connect with us

Nano Technology

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices

Published

on

Home > Press > New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices

Visualization of the structure of 4H-Si viewed perpendicular to the hexagonal axis. A transmission electron micrograph showing the stacking sequence is displayed in the background. CREDIT
Image courtesy of Thomas Shiell and Timothy Strobel
Visualization of the structure of 4H-Si viewed perpendicular to the hexagonal axis. A transmission electron micrograph showing the stacking sequence is displayed in the background. CREDIT
Image courtesy of Thomas Shiell and Timothy Strobel

Abstract:
A team led by Carnegie’s Thomas Shiell and Timothy Strobel developed a new method for synthesizing a novel crystalline form of silicon with a hexagonal structure that could potentially be used to create next-generation electronic and energy devices with enhanced properties that exceed those of the “normal” cubic form of silicon used today.

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices


Washington, DC | Posted on June 4th, 2021

Their work is published in Physical Review Letters.

Silicon plays an outsized role in human life. It is the second most abundant element in the Earth’s crust. When mixed with other elements, it is essential for many construction and infrastructure projects. And in pure elemental form, it is crucial enough to computing that the longstanding technological hub of the U.S.–California’s Silicon Valley–was nicknamed in honor of it.

Like all elements, silicon can take different crystalline forms, called allotropes, in the same way that soft graphite and super-hard diamond are both forms of carbon. The form of silicon most commonly used in electronic devices, including computers and solar panels, has the same structure as diamond. Despite its ubiquity, this form of silicon is not actually fully optimized for next-generation applications, including high-performance transistors and some photovoltaic devices.

While many different silicon allotropes with enhanced physical properties are theoretically possible, only a handful exist in practice given the lack of known synthetic pathways that are currently accessible.

Strobel’s lab had previously developed a revolutionary new form of silicon, called Si24, which has an open framework composed of a series of one-dimensional channels. In this new work, Shiell and Strobel led a team that used Si24 as the starting point in a multi-stage synthesis pathway that resulted in highly oriented crystals in a form called 4H-silicon, named for its four repeating layers in a hexagonal structure.

“Interest in hexagonal silicon dates back to the 1960s, because of the possibility of tunable electronic properties, which could enhance performance beyond the cubic form” Strobel explained.

Hexagonal forms of silicon have been synthesized previously, but only through the deposition of thin films or as nanocrystals that coexist with disordered material. The newly demonstrated Si24 pathway produces the first high-quality, bulk crystals that serve as the basis for future research activities.

Using the advanced computing tool called PALLAS, which was previously developed by members of the team to predict structural transition pathways–like how water becomes steam when heated or ice when frozen–the group was able to understand the transition mechanism from Si24 to 4H-Si, and the structural relationship that allows the preservation of highly oriented product crystals.

“In addition to expanding our fundamental control over the synthesis of novel structures, the discovery of bulk 4H-silicon crystals opens the door to exciting future research prospects for tuning the optical and electronic properties through strain engineering and elemental substitution,” Shiell said. “We could potentially use this method to create seed crystals to grow large volumes of the 4H structure with properties that potentially exceed those of diamond silicon.”

###

Carnegie’s Li Zhu was also a member of the research team, along with Brenton Cook and Dougal McCulloch of RMIT University and Jodie Bradby of The Australian National University.

This work was supported by the National Science Foundation, Division of Materials Research.

Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA’s Office of Experimental Sciences. The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory.

####

For more information, please click here

Contacts:
Tim Strobel

@carnegiescience

Copyright © Carnegie Institution for Science

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Quantum holds the key to secure conference calls June 6th, 2021

An atom chip interferometer that could detect quantum gravity June 4th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Laboratories

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Harvesting light like nature does:Synthesizing a new class of bio-inspired, light-capturing nanomaterials May 14th, 2021

Better solutions for making hydrogen may lie just at the surface April 9th, 2021

Design could enable longer lasting, more powerful lithium batteries: Use of a novel electrolyte could allow advanced metal electrodes and higher voltages, boosting capacity and cycle life March 26th, 2021

Govt.-Legislation/Regulation/Funding/Policy

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Hexagonal boron nitride’s remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

Possible Futures

Quantum holds the key to secure conference calls June 6th, 2021

An atom chip interferometer that could detect quantum gravity June 4th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Chip Technology

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Hexagonal boron nitride’s remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

Luminaries: Steven DenBaars and John Bowers receive top recognition at Compound Semiconductor Week conference May 21st, 2021

Tiny, Wireless, Injectable Chips Use Ultrasound to Monitor Body Processes May 12th, 2021

Discoveries

Quantum holds the key to secure conference calls June 6th, 2021

An atom chip interferometer that could detect quantum gravity June 4th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Materials/Metamaterials

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Hexagonal boron nitride’s remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

A novel nitrogen-doped dual-emission carbon dots as an effective fluorescent probe for ratiometric detection dopamine June 1st, 2021

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

Announcements

Quantum holds the key to secure conference calls June 6th, 2021

An atom chip interferometer that could detect quantum gravity June 4th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Quantum holds the key to secure conference calls June 6th, 2021

An atom chip interferometer that could detect quantum gravity June 4th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Energy

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

Emergence of a new heteronanostructure library May 14th, 2021

A silver lining for extreme electronics April 30th, 2021

Less innocent than it looks: Hydrogen in hybrid perovskites: Researchers identify the defect that limits solar-cell performance April 30th, 2021

Grants/Sponsored Research/Awards/Scholarships/Gifts/Contests/Honors/Records

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

Luminaries: Steven DenBaars and John Bowers receive top recognition at Compound Semiconductor Week conference May 21st, 2021

Hanging by a thread: Imaging and probing chains of single atoms: Scientists develop a method to visualize monoatomic chains and measure the strength and conductance of single-atom bonds May 14th, 2021

Nanophotonics enhanced coverslip for phase imaging in biology May 14th, 2021

Solar/Photovoltaic

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

Harvesting light like nature does:Synthesizing a new class of bio-inspired, light-capturing nanomaterials May 14th, 2021

Less innocent than it looks: Hydrogen in hybrid perovskites: Researchers identify the defect that limits solar-cell performance April 30th, 2021

A PTV-based polymer enabled organic solar cells with over 16% efficiency April 2nd, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56700

Nano Technology

New family of atomic-thin electride materials discovered

Published

on

Home > Press > New family of atomic-thin electride materials discovered

Yellow isosurfaces on left panel indicate electrons localized in-between the C3 trimers. Ionized structure on the right has no trapped electrons, and some of the M atoms have been largely displaced. This displacement of the M atoms again significantly stabilizes the ionized structure. CREDIT
Soungmin Bae and Hannes Raebiger
Yellow isosurfaces on left panel indicate electrons localized in-between the C3 trimers. Ionized structure on the right has no trapped electrons, and some of the M atoms have been largely displaced. This displacement of the M atoms again significantly stabilizes the ionized structure. CREDIT
Soungmin Bae and Hannes Raebiger

Abstract:
An exploratory investigation into the behavior of materials with desirable electric properties resulted in the discovery of a structural phase of two-dimensional (2D) materials. The new family of materials are electrides, wherein electrons occupy a space usually reserved for atoms or ions instead of orbiting the nucleus of an atom or ion. The stable, low-energy, tunable materials could have potential applications in nanotechnologies.

New family of atomic-thin electride materials discovered


Yokohama, Japan | Posted on June 11th, 2021

The international research team, led by Hannes Raebiger, associate professor in the Department of Physics at Yokohama National University in Japan, published their results on June 10th as frontispiece in Advanced Functional Materials.

Initially, the team set out to better understand the fundamental properties of a 2D system known as Sc2CO2. Containing two atoms of metallic scandium, one atom of carbon and two atoms of oxygens, the system belongs to a family of chemical compounds collectively referred to as MXenes. They are typically composed of a carbon or nitrogen layer one atom thick sandwiched between metal layers, dotted with oxygen or fluorine atoms.

The researchers were particularly interested in MXene Sc2CO2 due to the predictions that, when structured into a hexagonal phase, the system would have desired electrical properties.

“Despite these fascinating predictions of hexagonal phases of Sc2CO2, we are not aware of its successful fabrication as of yet,” said Soungmin Bae, first author and researcher in the Department of Physics at Yokohama National University. “Analyzing its fundamental properties, we discovered a completely new structural phase.”

The new structural phase results in new electride materials. The atomic-thin 2D structural phase is described as tiled shapes forming the central carbon plane. The previously predicted shape was a hexagon, with a carbon atom at every vertex and one in the middle. The new materials have a rhombus-like shape, with electrons at the vertices and a carbon trimer — three carbon atoms in a row — in the middle.

“Carbon is one of the most common materials on our planet, and quite important for living beings, but it is hardly ever found as trimers,” Raebiger said. “The closest place where carbon trimers are typically found is interstellar space.”

The overall shape is less symmetric than the previously described hexagonal structure, but it is more symmetric with regard to the central plane. This structure offers unique characteristics due to the appearance of the new family of electrides, according to Raebiger.

“Electrides contain electrons as a structural unit and often are extremely good electrical conductors,” Raebiger said. “The present family of electrides are insulators, and while most insulators can be made conductive by adding or removing electrons, these materials simply become more insulating.”

MXenes are particularly attractive as a material, because they can be reconfigured with other metallic elements to offer a cornucopia of properties, including tunable conductivity, various forms of magnetism, and/or accelerate chemical reactions as catalysts. On top of this, they are ultra-thin sheets only a few atoms thick, that is, 2D materials. The newly discovered electrides have electrons in lattice voids between atoms and ions, which can be readily emitted into surrounding space, such as the electron sources for large particle accelerators, as well as be borrowed to catalyze a specifically desired chemical reaction.

“We made this discovery because we wanted to understand how these materials work better,” Bae said. “If you encounter something you don’t understand, dig deeper.”

Co-authors include William Espinosa-García and Gustavo M. Dalpian, Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Brazil; Yoon-Gu Kang and Myung Joon Han, Department of Physics, Korea Advanced Institute of Science and Technology; Juho Lee and Yong-Hoon Kim, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology; Noriyuki Egawa, Kazuaki Kuwahata and Kaoru Ohno, Department of Physics at Yokohama National University; and Mohammad Khazaei and Hideo Hosono, Materials Research Center for Element Strategy, Tokyo Institute of Technology. Espinosa-García is also affiliated with Grupo de investigación en Modelamienot y Simulación Computacional, Facultad de Ingenierías, Universidad de San Buenaventura-Medellín.

The Iwaki Scholarship Foundation; São Paulo Research Foundation; Korea’s National Research Foundation, Ministry of Science and ICT and Ministry of Education; KAIST (formerly the Korea Advanced Institute of Science and Technology); and Samsung Research Funding & Incubation Center of Samsung Electronics funded this work.

####

About Yokohama National University
Yokohama National University (YNU or Yokokoku) is a Japanese national university founded in 1949. YNU provides students with a practical education utilizing the wide expertise of its faculty and facilitates engagement with the global community. YNU’s strength in the academic research of practical application sciences leads to high-impact publications and contributes to international scientific research and the global society.

For more information, please click here

Contacts:
Akiko Tsumura

Copyright © Yokohama National University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Possible Futures

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Discoveries

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Materials/Metamaterials

Researchers turned transparent calcite into artificial gold June 11th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Announcements

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Research partnerships

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Hexagonal boron nitride’s remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

Nanophotonics enhanced coverslip for phase imaging in biology May 14th, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56714

Continue Reading

Nano Technology

Molecular coating enhances organic solar cells

Published

on

Home > Press > Molecular coating enhances organic solar cells

The team fabricated an organic solar cell that, unlike conventional solar cells, can be easily recycled following the simple steps shown above. Adapted from Lin et al. (2021)
The team fabricated an organic solar cell that, unlike conventional solar cells, can be easily recycled following the simple steps shown above. Adapted from Lin et al. (2021)

Abstract:
An electrode coating just one molecule thick can significantly enhance the performance of an organic photovoltaic cell, KAUST researchers have found. The coating outperforms the leading material currently used for this task and may pave the way for improvements in other devices that rely on organic molecules, such as light-emitting diodes and photodetectors.

Molecular coating enhances organic solar cells


Thuwal, Saudi Arabia | Posted on June 11th, 2021

Unlike the most common photovoltaic cells that use crystalline silicon to harvest light, organic photovoltaic cells (OPVs) rely on a light-absorbing layer of carbon-based molecules. Although OPVs cannot yet rival the performance of silicon cells, they could be easier and cheaper to manufacture at a very large scale using printing techniques.

When light enters a photovoltaic cell, its energy frees a negative electron and leaves behind a positive gap, known as a hole. Different materials then gather the electrons and holes and guide them to different electrodes to generate an electrical current. In OPVs, a material called PEDOT:PSS is widely used to ease the transfer of generated holes into an electrode; however, PEDOT:PSS is expensive, acidic and can degrade the cell’s performance over time.

The KAUST team has now developed a better alternative to PEDOT:PSS. They use a much thinner coating of a hole-transporting molecule called Br-2PACz, which binds to an indium tin oxide (ITO) electrode to form a single-molecule layer. The organic cell using Br-2PACz achieved a power conversion efficiency of 18.4 percent, whereas an equivalent cell using PEDOT:PSS reached only 17.5 percent.

“We were very surprised indeed by the performance enhancement,” says Yuanbao Lin, Ph.D. student and member of the team. “We believe Br-2PACz has the potential to replace PEDOT:PSS due to its low cost and high performance.”

Br-2PACz increased the cell’s efficiency in several ways. Compared with its rival, it caused less electrical resistance, improved hole transport and allowed more light to shine through to the absorbing layer. Br-2PACz also improved the structure of the light-absorbing layer itself, an effect that may be related to the coating process.

The coating could even improve the recyclability of the solar cell. The researchers found that the ITO electrode could be removed from the cell, stripped of its coating and then reused as if it was new. In contrast, PEDOT:PSS roughens the surface of the ITO so that it performs poorly if reused in another cell. “We anticipate this will have a dramatic impact on both the economics of OPVs and the environment,” says Thomas Anthopoulos, who led the research.

####

For more information, please click here

Contacts:
Michael Cusack

Copyright © King Abdullah University of Science and Technology

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Organic Electronics

Light-emitting tattoo engineered for the first time: Scientists at UCL and the IIT -Istituto Italiano di Tecnologia (Italian Institute of Technology) have created a temporary tattoo with light-emitting technology used in TV and smartphone screens, paving the way for a new type of March 4th, 2021

Going Organic: uOttawa team realizing the limitless possibilities of wearable electronics January 28th, 2021

Engineers find antioxidants improve nanoscale visualization of polymers January 8th, 2021

HKU Engineering team develops novel miniaturised organic semiconductor: An important breakthrough essential for future flexible electronic devices October 8th, 2020

Possible Futures

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Discoveries

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Rice lab peers inside 2D crystal synthesis: Simulations could help molecular engineers enhance creation of semiconducting nanomaterials June 11th, 2021

Announcements

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Rice lab peers inside 2D crystal synthesis: Simulations could help molecular engineers enhance creation of semiconducting nanomaterials June 11th, 2021

Energy

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

Emergence of a new heteronanostructure library May 14th, 2021

Less innocent than it looks: Hydrogen in hybrid perovskites: Researchers identify the defect that limits solar-cell performance April 30th, 2021

Solar/Photovoltaic

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

Harvesting light like nature does:Synthesizing a new class of bio-inspired, light-capturing nanomaterials May 14th, 2021

Less innocent than it looks: Hydrogen in hybrid perovskites: Researchers identify the defect that limits solar-cell performance April 30th, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56711

Continue Reading

Nano Technology

Researchers turned transparent calcite into artificial gold

Published

on

Home > Press > Researchers turned transparent calcite into artificial gold

Figure shows 3D reconstruction of the golden vaterite and the laser-induced heating of the spherulites. CREDIT
Tel Aviv University
Figure shows 3D reconstruction of the golden vaterite and the laser-induced heating of the spherulites. CREDIT
Tel Aviv University

Abstract:
Breakthrough in metamaterials: for the first time in the world, researchers at Tel Aviv University developed an innovative nanotechnology that transforms a transparent calcite nanoparticle into a sparkling gold-like particle. In other words, they turned the transparent particle into a particle that is visible despite its very small dimensions. According to the researchers the new material can serve as a platform for innovative cancer treatments.

Researchers turned transparent calcite into artificial gold


Tel Aviv, Israel | Posted on June 11th, 2021

In a new paper published in Advanced Materials, an international team of scientists, coordinated by Dr. Roman Noskov and Dr. Pavel Ginzburg from the Iby and Aladar Fleischman Faculty of Engineering at Tel Aviv University, Prof. Dmitry Gorin from the Center for Photonics and Quantum Materials at the Skolkovo Institute of Science and Technology (Skoltech) and Dr. Evgeny Shirshin from M.V. Lomonosov Moscow State University, has introduced the concept of biofriendly delivery of optical resonances via a mesoscopic metamaterial, a material with properties that are not found in nature. This approach opens promising prospects for multifunctionality in biomedical systems, allowing the use of a single designer-made nanoparticle for sensing, photothermal therapy, photoacoustic tomography, bioimaging, and targeted drug delivery.

“This concept is the result of cross-disciplinary thinking at the interface between the physics of metamaterials and bioorganic chemistry, aiming to meet the needs of nanomedicine. We were able to create a mesoscopic submicron metamaterial from biocompatible components that demonstrates strong Mie resonances covering the near-infrared spectral window in which biological tissues are transparent,” says Dr. Roman Noskov.

The nanostructures capable of nanoscale light localization as well as performing several functions are highly desirable in a plethora of biomedical applications. However, biocompatibility is typically a problem, as engineering of optical properties often calls for using toxic compounds and chemicals. The researchers have resolved this issue by employing gold nanoseeds and porous vaterite (calcium carbonate) spherulites, currently considered promising drug-delivery vehicles. This approach involves controllable infusion of gold nanoseeds into a vaterite scaffold resulting in a mesoscopic metamaterial – golden vaterite – whose resonance properties can be widely tuned by changing the quantity of gold inside the vaterite. Additionally, high payload capacity of vaterite spherulites allows simultaneous loading of both drugs and fluorescent tags. To exemplify the performance of their system, the researchers demonstrated efficient laser heating of golden vaterite at red and near?infrared wavelengths, highly desirable in photothermal therapy, and photoacoustic tomography.

Prof. Pavel Ginzburg summarizes: “This novel platform enables the accommodation of multiple functionalities – as simple add-ons that can be introduced almost on demand. Alongside optical imaging and thermotherapy, MRI visibility, functional biomedical materials and many other modalities can be introduced within a miniature nano-scale particle. I believe that our collaborative efforts will lead to in-vivo demonstrations, which will pave the way for a new biomedical technology.”

####

For more information, please click here

Contacts:
Noga Shahar
054-770-5223

Copyright © Tel Aviv University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Cancer

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Targeting Cancer Detection & Identification of Microorganisms, CEA-Leti Develops Mid-Infrared, Spectral-Imaging Technique: Presentations at Photonics West 2021 Show How Early-Stage Imaging System’s Flexibility Can Be Applied Broadly in Medical Field March 18th, 2021

Nanothermometry to improve anticancer strategies February 10th, 2021

Nanoparticle drug delivery technique shows promise for treating pancreatic cancer: Method may also work for breast, prostate, ovarian cancer January 29th, 2021

Possible Futures

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Discoveries

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Materials/Metamaterials

New family of atomic-thin electride materials discovered June 11th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Announcements

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56712

Continue Reading

Nano Technology

New family of atomic-thin electride materials discovered

Published

on

Home > Press > New family of atomic-thin electride materials discovered

Yellow isosurfaces on left panel indicate electrons localized in-between the C3 trimers. Ionized structure on the right has no trapped electrons, and some of the M atoms have been largely displaced. This displacement of the M atoms again significantly stabilizes the ionized structure. CREDIT
Soungmin Bae and Hannes Raebiger
Yellow isosurfaces on left panel indicate electrons localized in-between the C3 trimers. Ionized structure on the right has no trapped electrons, and some of the M atoms have been largely displaced. This displacement of the M atoms again significantly stabilizes the ionized structure. CREDIT
Soungmin Bae and Hannes Raebiger

Abstract:
An exploratory investigation into the behavior of materials with desirable electric properties resulted in the discovery of a structural phase of two-dimensional (2D) materials. The new family of materials are electrides, wherein electrons occupy a space usually reserved for atoms or ions instead of orbiting the nucleus of an atom or ion. The stable, low-energy, tunable materials could have potential applications in nanotechnologies.

New family of atomic-thin electride materials discovered


Yokohama, Japan | Posted on June 11th, 2021

The international research team, led by Hannes Raebiger, associate professor in the Department of Physics at Yokohama National University in Japan, published their results on June 10th as frontispiece in Advanced Functional Materials.

Initially, the team set out to better understand the fundamental properties of a 2D system known as Sc2CO2. Containing two atoms of metallic scandium, one atom of carbon and two atoms of oxygens, the system belongs to a family of chemical compounds collectively referred to as MXenes. They are typically composed of a carbon or nitrogen layer one atom thick sandwiched between metal layers, dotted with oxygen or fluorine atoms.

The researchers were particularly interested in MXene Sc2CO2 due to the predictions that, when structured into a hexagonal phase, the system would have desired electrical properties.

“Despite these fascinating predictions of hexagonal phases of Sc2CO2, we are not aware of its successful fabrication as of yet,” said Soungmin Bae, first author and researcher in the Department of Physics at Yokohama National University. “Analyzing its fundamental properties, we discovered a completely new structural phase.”

The new structural phase results in new electride materials. The atomic-thin 2D structural phase is described as tiled shapes forming the central carbon plane. The previously predicted shape was a hexagon, with a carbon atom at every vertex and one in the middle. The new materials have a rhombus-like shape, with electrons at the vertices and a carbon trimer — three carbon atoms in a row — in the middle.

“Carbon is one of the most common materials on our planet, and quite important for living beings, but it is hardly ever found as trimers,” Raebiger said. “The closest place where carbon trimers are typically found is interstellar space.”

The overall shape is less symmetric than the previously described hexagonal structure, but it is more symmetric with regard to the central plane. This structure offers unique characteristics due to the appearance of the new family of electrides, according to Raebiger.

“Electrides contain electrons as a structural unit and often are extremely good electrical conductors,” Raebiger said. “The present family of electrides are insulators, and while most insulators can be made conductive by adding or removing electrons, these materials simply become more insulating.”

MXenes are particularly attractive as a material, because they can be reconfigured with other metallic elements to offer a cornucopia of properties, including tunable conductivity, various forms of magnetism, and/or accelerate chemical reactions as catalysts. On top of this, they are ultra-thin sheets only a few atoms thick, that is, 2D materials. The newly discovered electrides have electrons in lattice voids between atoms and ions, which can be readily emitted into surrounding space, such as the electron sources for large particle accelerators, as well as be borrowed to catalyze a specifically desired chemical reaction.

“We made this discovery because we wanted to understand how these materials work better,” Bae said. “If you encounter something you don’t understand, dig deeper.”

Co-authors include William Espinosa-García and Gustavo M. Dalpian, Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Brazil; Yoon-Gu Kang and Myung Joon Han, Department of Physics, Korea Advanced Institute of Science and Technology; Juho Lee and Yong-Hoon Kim, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology; Noriyuki Egawa, Kazuaki Kuwahata and Kaoru Ohno, Department of Physics at Yokohama National University; and Mohammad Khazaei and Hideo Hosono, Materials Research Center for Element Strategy, Tokyo Institute of Technology. Espinosa-García is also affiliated with Grupo de investigación en Modelamienot y Simulación Computacional, Facultad de Ingenierías, Universidad de San Buenaventura-Medellín.

The Iwaki Scholarship Foundation; São Paulo Research Foundation; Korea’s National Research Foundation, Ministry of Science and ICT and Ministry of Education; KAIST (formerly the Korea Advanced Institute of Science and Technology); and Samsung Research Funding & Incubation Center of Samsung Electronics funded this work.

####

About Yokohama National University
Yokohama National University (YNU or Yokokoku) is a Japanese national university founded in 1949. YNU provides students with a practical education utilizing the wide expertise of its faculty and facilitates engagement with the global community. YNU’s strength in the academic research of practical application sciences leads to high-impact publications and contributes to international scientific research and the global society.

For more information, please click here

Contacts:
Akiko Tsumura

Copyright © Yokohama National University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Possible Futures

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Discoveries

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Materials/Metamaterials

Researchers turned transparent calcite into artificial gold June 11th, 2021

Using HPC and experiment, researchers continue to refine graphene production: Researchers from the Technical University of Munich have been using GCS HPC resources to develop more efficient methods for producing graphene at the industrial scale June 4th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Announcements

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

NASA Chief Scientist Dr. Jim Green to Appear at the Online NSS International Space Development Conference 2021: This Year’s Virtual Conference Streams Free to ALL June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Molecular coating enhances organic solar cells June 11th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Research partnerships

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Hexagonal boron nitride’s remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

Nanophotonics enhanced coverslip for phase imaging in biology May 14th, 2021

Coinsmart. Beste Bitcoin-Börse in Europa
Source: http://www.nanotech-now.com/news.cgi?story_id=56714

Continue Reading
Esports4 days ago

Genshin Impact Echoing Conch Locations Guide

Esports4 days ago

MLB The Show 21 Kitchen Sink 2 Pack: Base Round Revealed

Aviation3 days ago

The Story Of The Boeing 777 Family

zephyrnet4 days ago

7th Global Blockchain Congress by Agora Group & TDeFi on June 21st and 22nd, 2021, Dubai.

Esports4 days ago

Free boxes and skins up for grabs in Brawl Stars to celebrate one-year anniversary of China release

Crowdfunding3 days ago

April/May 2021 Top Campaigns

Blockchain4 days ago

Woonkly will be the official Title Sponsor of the 7th edition Global Blockchain Congress organized by Agora Group in Dubai

Big Data4 days ago

.NET DEVELOPMENT

Blockchain4 days ago

Death Cross is Appearing Over Bitcoin Price Chart

Blockchain4 days ago

Bitcoin (BTC) Officially a Legal Tender in El Salvador

Blockchain3 days ago

Crypto Fund Manager Says Bitcoin ETFs to be Approved By 2022

Crowdfunding4 days ago

US Fintech Broadridge Partners with Amazon Web Services to Expand Private Market Hub, Leveraging DLT

Big Data4 days ago

China arrests over 1,100 suspects in crackdown on crypto-related money laundering

Gaming4 days ago

TrustDice Review: Features & Promotions

Cleantech4 days ago

TC Energy Cancels Keystone XL Pipeline

Energy2 days ago

Industrial robots market in the automotive industry | $ 3.97 billion growth expected during 2021-2025 | 17000+ Technavio Research Reports

Cyber Security2 days ago

Data Breach that Impacted Both Audi of America and Volkswagen of America

Esports3 days ago

Every new Passive Power in Legends of Runeterra Lab of Legends 2.9.0

Fintech3 days ago

PayPal launches PayPal Rewards Card in Australia

Energy2 days ago

Daiki Axis Co., Ltd. (4245, First Section, Tokyo Stock Exchange) Overview of Operating Performance for the First Three Months Ended March 31, 2021

Trending