Preconcentration of volatile organics on self-assembled, carbon nanotubes in a microtrap

Chutarat Saridara, Roman Brukh, Zafar Iqbal, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

This paper reports the self-assembly of carbon nanotubes (CNTs) on the inside wall of a steel capillary to fabricate a microtrap for the adsorption/desorption of trace organics. The microtrap functioned as a nanoconcentrator and an injector for gas chromatography (GC). The CNTs were deposited as a thin film by catalytic chemical vapor deposition from either CO or C2H4 as the precursor. The sorbent film synthesized from C2H4-CVD (CVD = chemical vapor deposition) had higher CNT density and thus was a stronger sorbent. In general, the CNT microtraps showed high-capacity adsorption and fast quantitative desorption, and the process showed excellent precision. This study demonstrates that CNT films can be deposited quite easily in a steel capillary for use in different analytical applications, and CNT films can perform as efficiently as packed-bed carbon sorbents.

Original languageEnglish (US)
Pages (from-to)1183-1187
Number of pages5
JournalAnalytical Chemistry
Volume77
Issue number4
DOIs
StatePublished - Feb 15 2005

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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