title: Capacitance and conductance of single-walled carbon nanotubes in the presence of chemical vapors.
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.
authors.affiliation: Naval Research Laboratory, Washington, D.C. 20375, USA. snow@bloch.nrl.navy.mil
authors.forename: Eric S
authors.initials: ES
authors.lastname: Snow
authors.forename: F Keith
authors.initials: FK
authors.lastname: Perkins
mesh_terms: D000327:Adsorption; D025802:Electric Capacitance; D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis* / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D043942:Nanotubes / Q000737:chemistry*; D014159:Transducers
chemical_list: D005740:Gases