Ammonia sensing properties of centimeter scaled CVD graphene in ambient condition

Juhwan Lim, Rani Anoop, Jong H. Kim, Jaehyuk Yoon, Hye Rin Ahn, Soonho Song, Yong Jun Kim, Seong Chan Jun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The present work reports ammonia (NH 3) gas sensing properties of Graphene film synthesized by chemical vapor deposition (CVD) in ambient condition. Graphene with a large area as centimeter scale was synthesized on Cu foils by chemical vapor deposition under ambient pressure and has transferred onto Si/SiO 2 wafer. By fabricating ohmic contact to both side of graphene layer, we measured DC resistance changes with respect to NH 3 gas flow. The gas molecules are absorbed on graphene by chemisorption and causes resistance change of graphene which is increasing by electron injection from ammonia molecules. The sensing characteristics of graphene has been examined by changing the inlet gas flow and the sensor shows better performance with large flow, such as fast response time and high sensitivity.

Original languageEnglish
Title of host publicationNanotechnology 2012
Subtitle of host publicationElectronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
Pages110-113
Number of pages4
Publication statusPublished - 2012
EventNanotechnology 2012: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 - Santa Clara, CA, United States
Duration: 2012 Jun 182012 Jun 21

Publication series

NameTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012

Other

OtherNanotechnology 2012: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
CountryUnited States
CitySanta Clara, CA
Period12/6/1812/6/21

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Surfaces, Coatings and Films

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