Carbon nanotube electron ionization source for portable mass spectrometry

Cold cathode carbon nanotubes (CNTs) are used in a low-voltage quadrupole ion trap mass spectrometer and shown to be a viable low-power alternative to filament sources for portable mass spectrometry instrumentation. No heating is necessary, and the power consumption depends only on the switching characteristics of the electronics. The CNT electron sources are mounted directly in the ring electrode, and their performance is compared directly with a filament source also mounted in the ring electron. Up to a 5 × 10 -4 Torr CO 2 environment, reflecting conditions expected during operation in a Mars atmosphere, the CNT emitters may provide up to 1 μA of current over more than 200 h. © 2011 American Chemical Society.

Full Text

Duke Authors

Cited Authors

  • Evans-Nguyen, T; Parker, CB; Hammock, C; Monica, AH; Adams, E; Becker, L; Glass, JT; Cotter, RJ

Published Date

  • 2011

Published In

Volume / Issue

  • 83 / 17

Start / End Page

  • 6527 - 6531

PubMed ID

  • 21718010

International Standard Serial Number (ISSN)

  • 0003-2700

Digital Object Identifier (DOI)

  • 10.1021/ac200643m

Citation Source

  • SciVal