Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

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

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Chemistry

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Sensors

Successful boron-doping of graphene nanoribbon August 27th, 2015

Nanotechnology that will impact the Security & Defense sectors to be discussed at NanoSD2015 conference August 25th, 2015

High Precision, High Stability XYZ Microscope Stages, with Capacitive Feedback August 18th, 2015

Setting ground rules for nanotechnology research: Two new projects set the stage for nanotechnology research to move into Big Data August 18th, 2015

Discoveries

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

CWRU researchers efficiently charge a lithium-ion battery with solar cell: Coupling with perovskite solar cell holds potential for cleaner cars and more August 27th, 2015

Successful boron-doping of graphene nanoribbon August 27th, 2015

Announcements

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Nanolab Technologies LEAPS Forward with High-Performance Analysis Services to the World: Nanolab Orders Advanced Local Electrode Atom Probe (LEAP®) Microscope from CAMECA Unit of AMETEK Materials Analysis Division August 27th, 2015

Environment

Successful boron-doping of graphene nanoribbon August 27th, 2015

Iranian Scientists Utilize Nanomembranes to Purify Wastewater of Olive Oil Plants August 20th, 2015

'Diamonds from the sky' approach turns CO2 into valuable products August 19th, 2015

Sonocatalysts Able to Purify Organic Pollutants of Wastewater August 19th, 2015

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







Car Brands
Buy website traffic