Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Two Layers are Better than One for Nitric Oxide Detection

Abstract:
Nitric oxide detectors made of two to four layers of MoS2 incorporated into a field-effect transistor are better than the corresponding single-layered device, say researchers in Singapore.

Two Layers are Better than One for Nitric Oxide Detection

Singapore | Posted on October 21st, 2011

Nitric oxide (NO) is an air pollutant implicated in the formation of acid rain, which is produced in many sectors, including automotive, industrial, and agricultural. As emissions rise and standards tighten, the need to accurately, quickly, and cheaply detect levels of NO using portable and low-energy detectors is increasing.

There are many approaches to this detection, most based on 1D or 2D semiconductor surfaces. Graphene has been used for this purpose, as have single-layer MoS2 and other related compounds. MoS2 was recently used to produce field-effect transistors (FETs), which were able to detect NO.

Now, scientists at Nanyang Technological University, Singapore, led by Hua Zhang, have made not only FET devices containing a single MoS2 layer but also devices containing two, three, and four layers. The single-layer devices had a rapid and dramatic response to NO, but their current was not stable so they may not prove suitable for use in the field. On the other hand, the multilayered devices had stable and sensitive responses with a detection limit of just 0.8 ppm.

Better and cheaper 2D NO sensors should enable toxic gas levels to be monitored more easily and cheaply in a variety of situations and countries. The multilayer dimension of this work could also be applied to other applications of MoS2 such as dry lubrication, catalysis, generation of hydrogen gas, etc., as well as inspiring work on multiple layers in other systems.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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

H. Li et al., Small ; DOI: 10.1002/smll.201101016

Related News Press

News and information

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

SUNY Polytechnic Institute Invites the Public to Attend its Popular Statewide 'NANOvember' Series of Outreach and Educational Events October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Chemistry

Iranian, Malaysian Scientists Study Nanophotocatalysts for Water Purification October 23rd, 2014

Could I squeeze by you? Ames Laboratory scientists model molecular movement within narrow channels of mesoporous nanoparticles October 21st, 2014

Sensors

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

Journal Nanotechnology Progress International (JONPI), 2014, Volume 5, Issue 1, pp 1-24 October 22nd, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Graphenea opens US branch October 16th, 2014

Discoveries

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Iranian, Malaysian Scientists Study Nanophotocatalysts for Water Purification October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Announcements

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Environment

Iranian, Malaysian Scientists Study Nanophotocatalysts for Water Purification October 23rd, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Plastic nanoparticles also harm freshwater organisms October 18th, 2014

NanoNews-Digest
The latest news from around the world, FREE





  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE