Self-assembled carbon nanotubes in a microtrap for chemical sensing and chromatography

Chutarat Saridara, Roman Brukh, Zafar Iqbal, Somenath Mitra

Research output: Contribution to journalConference articlepeer-review


The first application of self-assembled carbon nanotubes (CNT) inside a steel capillary to fabricate a microtrap for the nanoscale adsorption/desorption of organic molecules is presented. The CNT-coated microtrap functions as a nanoconcentrator that can be used for sensing and analytical-scale separation, e.g., GC. The CNT deposit as a thin-film on the walls of the capillary from either CO or C2H4 carbon precursors. Trace level small organic molecules, e.g., hexane and toluene, are adsorbed and then rapidly desorbed from the CNT film inside the capillary. The desorption pulse provides a concentrated injection for the detector, and also for GC separation. Sorption of toluene is much stronger than that of hexane, which is attributed to the p-p interaction between the CNT sidewall and the aromatic ring of toluene. This is an abstract of a paper presented at the 230th ACS National Meeting (Washington, DC 8/28/2005-9/1/2005).

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - 2005
Event230th ACS National Meeting - Washington, DC, United States
Duration: Aug 28 2005Sep 1 2005

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering


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