Ultrafast gas chromatography on single-wall carbon nanotube stationary phases in microfabricated channels

Michael Stadermann, Adam D. McBrady, Brian Dick, Vanessa R. Reid, Aleksandr Noy, Robert E. Synovec, Olgica Bakajin

Research output: Contribution to journalArticlepeer-review

127 Scopus citations

Abstract

The key to rapid temperature programmed separations with gas chromatography are a fast, low-volume injection and a short microbore separation column with fast resistive heating. One of the major problems with the reduction of column dimensions for micro gas chromatography is the availability of a stationary phase that provides good separation performance. In this report, we present the first integration of single-wall carbon nanotubes (SWNTs) as a stationary phase into 100 μm × 100 μm square and 50-cm-long microfabricated channels. The small size of this column with integrated resistive heater and the robustness of the SWNT phase allow for fast temperature programming of up to 60 °C/s. A combination of the fast temperature programming and the narrow peak width of small-volume injections that can be obtained from a high-speed, dual-valve injection system allows for rapid separations of gas mixtures. We demonstrate highly reproducible separations of four-compound test mixtures on these columns in less than 1 s using fast temperature programming.

Original languageEnglish (US)
Pages (from-to)5639-5644
Number of pages6
JournalAnalytical Chemistry
Volume78
Issue number16
DOIs
StatePublished - Aug 15 2006
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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