HOME >> BIOLOGY >> NEWS
New gas sensors patterned with conducting polymer

An improved method for depositing nanoporous, conducting polymer films on miniaturized device features has been demonstrated by researchers at the National Institute of Standards and Technology (NIST).

Described in the April 6 issue of the Journal of the American Chemical Society,* the method may be useful as a general technique for reproducibly fabricating microdevices such as sensors for detecting toxic chemicals.

Unlike most polymers, conducting polymers have the electrical and optical properties of metals or semiconductors. These materials are of increasing interest in microelectronics because they are inexpensive, flexible and easy to synthesize.

Polyaniline is a particularly promising conducting polymer for microelectronics applications, but it is difficult to process because it doesn't dissolve in most solvents. NIST researchers have circumvented this problem by dispersing nanoscale particles of polyaniline into a mild solvent.

"The beauty of the method," says NIST guest researcher Guofeng Li, "is that the polyaniline chain carries a natural positive charge." Once the particles are formed, electrostatic repulsion prevents them from clumping together. Moreover, the positively charged particles then can be manipulated and patterned on complex device structures by applying an electrical field.

The process produces a sponge-like coating that efficiently captures gaseous molecules. So far NIST researchers have demonstrated that such coatings can detect the difference between methanol and water vapor. Additional tests will be needed before the polymer devices could be used for detecting toxic gases.

NIST holds patents for previous work using microheaters coated with nanostructured tin oxide films. As the microheaters cycle through a series of temperatures, changes in electrical resistance are used to detect toxic gases at part per billion levels. Ultimately, NIST researchers hope to develop inexpensive arrays of mi
'"/>

Contact: Gail Porter
gail.porter@nist.gov
301-975-3392
National Institute of Standards and Technology (NIST)
12-Apr-2005


Page: 1 2

Related biology news :

1. Space-borne sensors help Africa tackle water shortage problems
2. Nanotechnology helps scientists make bendy sensors for hydrogen vehicles
3. Magnetic computer sensors may help study biomolecules
4. Flexible electronics could find applications as sensors, artificial muscles
5. Microscopic sea creatures provide foundation for gas sensors and other devices
6. Biologically inspired sensors can augment sonar, vision system in submarines
7. Breakthrough in nanodevice synthesis revolutionizes biological sensors
8. Salk scientist Ron Evans wins 2006 Gairdner Award for his discovery of hormone sensors
9. DNA-wrapped carbon nanotubes serve as sensors in living cells
10. MERIS/AATSR Workshop looks at twin sensors with many uses
11. MERIS/AATSR Workshop: Focus on Envisat sensors measuring heat and light

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: New gas sensors patterned with conducting polymer

(Date:8/19/2015)... 2015  VOXX International Corporation (Nasdaq: VOXX ... a Definitive Agreement to purchase the assets, inclusive ... leader EyeLock through an acquiring entity.  Upon consummation ... interest in the acquiring entity. The closing of ... diligence.  Expanding on its existing supply chain and ...
(Date:8/12/2015)... Florida , August 12, 2015 ... pace of mobile payment innovation and advanced biometrics technology ... replace the way consumers rely on using their credit ... with reinventing the future for payment services led by ... NXTD ), :  Google, Inc. (NASDAQ: GOOG ...
(Date:8/10/2015)... August 10, 2015 The latest 364 ... comprehensive analysis of the global border security market . ... of $16.4bn in 2015. Now: Border security is ... example of the business critical issue you need to know ... visiongain ,s objective analysis of how this will impact your ...
Breaking Biology News(10 mins):VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 4Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 2Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 4Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 5Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 7Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 8Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 9
(Date:9/1/2015)... ... ... Knowledgent , the data and analytics firm, today announced a new ... the healthcare industry. , As the Internet of Things (IoT) continues to grab headlines ... years as more entities become technology enabled through Electronic Medical Records (EMRs). , With ...
(Date:9/1/2015)... ... September 01, 2015 , ... A new host-based therapy ... at the Keck Graduate Institute and its collaborators. The discovery has the potential ... published online on August 27 by Scientific Reports, an open access research journal ...
(Date:9/1/2015)... , September 1, 2015 Shire ... of Sara Mathew to its Board of Directors ... of the Audit, Compliance & Risk Committee of the Shire ... 2015. Sara previously served as Chairman, President and ... in December 2013. During her 12-year tenure at D&B, she ...
(Date:8/31/2015)... Pune (PRWEB) , ... August 31, 2015 , ... ... in various industries because of its properties such as low carbon footprints and ... by the use of petroleum based plastics. On the basis of applications, the ...
Breaking Biology Technology:New White Paper Explores Data Lake Opportunities in the Healthcare Industry 2Scientists Discover New Use for an Old Therapy Inhibiting Deadly Pathogens Including Ebola and Anthrax 2Scientists Discover New Use for an Old Therapy Inhibiting Deadly Pathogens Including Ebola and Anthrax 3Scientists Discover New Use for an Old Therapy Inhibiting Deadly Pathogens Including Ebola and Anthrax 4Shire Appoints Sara Mathew to Board of Directors 2Biodegradable Plastics Market Growing at 10.8% CAGR to 2020 2Biodegradable Plastics Market Growing at 10.8% CAGR to 2020 3Biodegradable Plastics Market Growing at 10.8% CAGR to 2020 4Biodegradable Plastics Market Growing at 10.8% CAGR to 2020 5
Cached News: