Capacitance and conductance of single-walled carbon nanotubes in the presence of chemical vapors

Nano Lett. 2005 Dec;5(12):2414-7. doi: 10.1021/nl051669c.

Abstract

Simultaneous conductance and capacitance measurements on a single-walled carbon nanotube (SWNT) network are used to extract an intrinsic property of molecular adsorbates. Adsorbates from dilute chemical vapors produce a rapid response in both the capacitance and the conductance of the SWNT network. These responses are caused by a combination of two distinct physiochemical properties of the adsorbates: charge transfer and polarizability. We find that the ratio of the conductance response to the capacitance response is a concentration-independent intrinsic property of a chemical vapor that can assist in its identification.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adsorption
  • Electric Capacitance
  • Electric Conductivity
  • Electrochemistry / instrumentation*
  • Electrochemistry / methods
  • Equipment Design
  • Equipment Failure Analysis
  • Gases / analysis*
  • Gases / chemistry*
  • Nanotechnology / instrumentation*
  • Nanotechnology / methods
  • Nanotubes / chemistry*
  • Transducers*

Substances

  • Gases