By Topic

Carbon nanotube and graphene based gas micro-sensors fabricated by dielectrophoresis on silicon

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
MacNaughton, S. ; Dept. of Electr. Eng., Tufts Univ., Medford, MA, USA ; Sonkusale, S. ; Surwade, S. ; Ammu, S.
more authors

A gas sensor based upon an array of reduced graphene oxide (RGO) and single wall carbon nanotube (SWNT) micro-assemblies is presented. Due to the nature of their structure and exceptional surface-to-volume ratio, graphene sheets and carbon nanotubes demonstrate unparalleled chemisorption properties, providing greater sensitivities than a bulk material. Micro-assemblies of RGO platelets and SWNT's were created on lithographically patterned electrode arrays utilizing dielectrophoresis. The resistivity of the assemblies can be tuned by adjusting the amplitude and frequency of the applied field. The completed array was tested in an enclosed chamber into which various gases were introduced (including common volatile organic compounds and simulants of nerve agents). Changes in the resistance of each micro-assembly due to chemisorption were monitored. Both types of assemblies (RGO and SWNT) demonstrated unique and repeatable responses to various organic compounds and other vapors. Consistent assembly and gas response results were achieved for sensor elements across many substrates.

Published in:

Sensors, 2010 IEEE

Date of Conference:

1-4 Nov. 2010