Subscribe to our free daily newsletters
  Nano Technology News  




Subscribe to our free daily newsletters



NANO TECH
Application of air-sensitive semiconductors in nanoelectronics
by Staff Writers
Tomsk, Russia (SPX) Sep 25, 2017


Raman spectrum of 8 L GaSe taken at two different times during time evolution map. (a) Red dashed line is drawn as the guide for the eye. The constant intensity ratio of of ${{{A}}^{1}}_{1{\rm{g}}}$ and a-Se peaks indicates that oxidation stops approximately after 16 500 s. Thickness dependent Raman spectrum of GaSe for oxidation investigation. (b) Each spectrum was taken with 700 s + 3 of accumulation time.

A research group consisting of scientists from Tomsk Polytechnic University, Germany and Venezuela proved vulnerability of a two-dimensional semiconductor gallium selenide in air. This discovery will allow manufacturing superconducting nanoelectronics based on gallium selenide, which has never been previously achieved by any research team in the world.

The study was published in Semiconductor Science and Technology.

One of the promising areas of modern materials science is the study of two-dimensional (2D) materials, i.e. thin films consisting of one or several atomic layers. 2D materials due to their electrical superconductivity and strength could be a basis for modern nanoelectronics. Optic applications in nanoelectronics require advanced materials capable of 'generating' great electron fluxes upon light irradiation. Gallium selenide (GaSe) is one of the 2D semiconductors that can cope with this problem most efficiently.

'Some research teams abroad tried to create electronic devices based on GaSe. However, despite extensive theoretical studies of this material, which were published in major scientific journals, the stability of the material in real devices remained unclear,' says Prof. Raul Rodriguez, the Department of Lasers and Lighting Engineering. The research team revealed the reasons behind this. They studied GaSe by means of Raman spectroscopy and x-ray photoelectron spectroscopy that allowed proving the existence of chemical bonds between gallium and oxygen. Photoluminescence in oxidized substance is absent that also proves the formation of oxides. It means that the scientists revealed that GaSe oxidizes quickly in air and loses its electrical conductivity necessary for creating nanoeletronic devices.

'GaSe monolayers become oxidized almost immediately after being exposed to air. Further research of GASe stability in air will allow making proposals how to protect it and maintain its optoelectronic properties,' emphasize the authors.

According to Prof. Rodriguez, for GaSe not to lose its unique properties it should be placed in a vacuum or inert environment. For example, it can be applied in encapsulated devices that are vacuum-manufactured and then covered with a protective layer eliminating air penetration.

This method can be used to produce next generation optoelectronics, detectors, light sources and solar batteries. Such devices of ultra-small sizes will have very high quantum efficiency, i.e. they will be able to generate large electron fluxes under small external exposure.

Research paper

NANO TECH
A new kind of optical nanosensor uses torque for signal processing
Washington DC (SPX) Sep 19, 2017
The world of nanosensors may be physically small, but the demand is large and growing, with little sign of slowing. As electronic devices get smaller, their ability to provide precise, chip-based sensing of dynamic physical properties such as motion become challenging to develop. An international group of researchers have put a literal twist on this challenge, demonstrating a new nanoscale ... read more

Related Links
Tomsk Polytechnic University
Nano Technology News From SpaceMart.com
Computer Chip Architecture, Technology and Manufacture


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

NANO TECH
Researchers create first global map of water in moon's soil

Call For Ideas For Research On The Deep Space Gateway

Analysis of a 'rusty' lunar rock suggests the moon's interior is dry

Roscosmos Approves Luna-25 Space Station Model in Moon Exploration Project

NANO TECH
Work on China's mission to Mars 'well underway'

Chinese company eyes development of reusable launch vehicle

Spacecraft passes docking test

China, Russia to Have Smooth Space Cooperation, Says Expert

NANO TECH
Israeli firms seek hi-tech help -- in Gaza

Equifax executives step down after major hack

Massive bureau hack raises troubling questions

EU defence ministers put to test in mock cyberattack

NANO TECH
Researchers create first global map of water in moon's soil

Call For Ideas For Research On The Deep Space Gateway

Analysis of a 'rusty' lunar rock suggests the moon's interior is dry

Roscosmos Approves Luna-25 Space Station Model in Moon Exploration Project

NANO TECH
Application of air-sensitive semiconductors in nanoelectronics

A new kind of optical nanosensor uses torque for signal processing

New insights into nanocrystal growth in liquid

'Nano-hashtags' could provide definite proof of Majorana particles

NANO TECH
Dust devils contribute large amount of particulate matter to atmospheres of Earth, Mars

Earth through different eyes

Boeing to Design and Build Seven Medium Earth Orbit Satellites for SES

Team gathers unprecedented data on atmosphere's organic chemistry

NANO TECH
Application of air-sensitive semiconductors in nanoelectronics

A new kind of optical nanosensor uses torque for signal processing

New insights into nanocrystal growth in liquid

'Nano-hashtags' could provide definite proof of Majorana particles

NANO TECH
From self-folding robots to computer vision

Scientists create world's first 'molecular robot' capable of building molecules

Robot 'conductor' steals the show from Italy's top tenor

Artificial 'skin' gives robotic hand a sense of touch




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement