title: Ultrafast gas chromatography on single-wall carbon nanotube stationary phases in microfabricated channels.
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 mum x 100 mum 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 degrees 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.
authors.affiliation: Chemistry & Material Science, Lawrence Livermore National Laboratory, Livermore, California 74550, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Stadermann
authors.forename: Adam D
authors.initials: AD
authors.lastname: McBrady
authors.forename: Brian
authors.initials: B
authors.lastname: Dick
authors.forename: Vanessa R
authors.initials: VR
authors.lastname: Reid
authors.forename: Aleksandr
authors.initials: A
authors.lastname: Noy
authors.forename: Robert E
authors.initials: RE
authors.lastname: Synovec
authors.forename: Olgica
authors.initials: O
authors.lastname: Bakajin