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

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Harris & Harris Group Portfolio Company, HZO, Announces Partnerships with Dell and Motorola August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Kalam: versatility personified August 1st, 2015

Chemistry

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Meet the high-performance single-molecule diode: Major milestone in molecular electronics scored by Berkeley Lab and Columbia University team July 29th, 2015

'Seeing' molecular interactions could give boost to organic electronics July 28th, 2015

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Sensors

Gold-diamond nanodevice for hyperlocalised cancer therapy: Gold nanorods can be used as remote controlled nanoheaters delivering the right amount of thermal treatment to cancer cells, thanks to diamond nanocrystals used as temperature sensors August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Controlling Dynamic Behavior of Carbon Nanosheets in Structures Made Possible July 30th, 2015

Non-Enzyme Sensor Determines Level of Blood Sugar July 29th, 2015

Discoveries

Gold-diamond nanodevice for hyperlocalised cancer therapy: Gold nanorods can be used as remote controlled nanoheaters delivering the right amount of thermal treatment to cancer cells, thanks to diamond nanocrystals used as temperature sensors August 1st, 2015

Shaping the hilly landscapes of a semi-conductor nanoworld August 1st, 2015

Solid state physics: Quantum matter stuck in unrest August 1st, 2015

Self-assembling, biomimetic membranes may aid water filtration August 1st, 2015

Announcements

Self-assembling, biomimetic membranes may aid water filtration August 1st, 2015

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Harris & Harris Group Portfolio Company, HZO, Announces Partnerships with Dell and Motorola August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Environment

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Laboratorial Performance of Nanocomposite Membrane Improved in Water Purification July 28th, 2015

Nanosorbents Reduce Amount of Heavy Metals in Petrochemical Wastewater July 23rd, 2015

Nanopaper as an optical sensing platform July 23rd, 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