Trace gas detection using nanostructured graphite layers
- 3 December 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 91 (23), 233101
- https://doi.org/10.1063/1.2820387
Abstract
Nanostructured graphite (NG) has been investigated as a sensing material using a highly sensitive potentiometric detection technique. concentration down to was detected in ambient conditions using NG functionalization layer. Simultaneous current and surface work function (SWF) change transients measured using NG functionalization layer reveal much shorter response time for the later, which is attributed to its dependence solely on surface molecular adsorption. The gradient of SWF with respect to the current transient was found to be independent of gaseous concentration and fraction of preoccupied surface states.
Keywords
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