Carbon Nanotube Stationary Phase in a Microfabricated Column for High-Performance Gas Chromatography

Nakai, T.; Okawa, Jun; Takada, Shuji; Shimizu, Masaki; Shiomi, Junichiro; Delaunay, Jean‐Jacques; Maruyama, Shigeo; Yamada, Isao; Pardo, Matteo; Sberveglieri, Giorgio

doi:10.1063/1.3156518

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…Researchers from both the University of Washington/Lawrence Livermore National Laboratories and University of Tokyo describe the use of CNTs as stationary phases. Nakai et al from the University of Tokyo also reports on the use of a functionalized parylene as a stationary phase.…”

Section: Portable and Microfabricated Gc Technology Developmentmentioning

confidence: 99%

Gas Chromatography

et al. 2010

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Section: Portable and Microfabricated Gc Technology Developmentmentioning

confidence: 99%

Gas Chromatography

et al. 2010

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“…Thanks to advances in microelectromechanical systems (MEMS) technology, miniaturization of GC systems (micro-GC) was made possible [1][2]. Further miniaturization and optimization of the GC components have been actively researched and developed [3][4][5][6][7]. The realization of micro-GC systems will open up new applications such as breath analysis, enabling non-invasive and fast screening/monitoring of infectious diseases.…”

Section: Introductionmentioning

confidence: 99%

Micro Gas Preconcentrator Made of a Film of Single-Walled Carbon Nanotubes

et al. 2010

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The development of a micro gas preconcentrator is crucial for the realization of miniaturized gas chromatography (micro-GC) systems which are expected to open up new applications such as breath analysis. One of the major problems with the reduction of preconcentrator size by miniaturization is the availability of a sorbent material which provides high enough concentration factor. Single-walled carbon nanotubes (SWNTs) are promising materials for high adsorption capacity. In this report, a gas preconcentrator having the depth of 40 μm and the volume of 1 μL was microfabricated. The synthesized SWNT film with a thickness of 30 μm was embedded in the micro gas preconcentrator by using the hot water-assisted detachment method. The small size of the fabricated micro gas preconcentrator and the use of SWNTs as the adsorbent material allow for achieving a concentration factor as high as 16000 for 2 ppm octane. This value is the highest of micro gas preconcentrators, reported to date, and sufficient for micro-GC detectors to concentrate trace analytes of interest for breath analysis. It is demonstrated that the micro gas preconcentrators using SWNTs as an adsorbent material have great potential to concentrate compounds.

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“…During the past decade, carbon-based nanomaterials have found uses in various analytical applications such as solid-phase extraction, − gas chromatography, − and electrophoresis. − In contrast, much less work has been performed with carbon-based nanostructures in the field of HPLC. One area of study that has been performed with HPLC is the deposition of carbon nanotubes (CNT) onto silica beads to enhance the stationary phase for the separation of aromatic compounds. − In one study, Zhong et al prepared poly(styrene- co -divinylbenzene) particles with a small amount of embedded or grafted CNT which provided improved selectivity and efficiency .…”

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Porous Polymer Monoliths Functionalized through Copolymerization of a C60 Fullerene-Containing Methacrylate Monomer for Highly Efficient Separations of Small Molecules

et al. 2011

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Monolithic poly(glycidyl methacrylate-co-ethylene dimethacrylate) and poly(butyl methacrylate-co-ethylene dimethacrylate) capillary columns, which incorporate the new monomer [6,6]-phenyl-C61-butyric acid 2-hydroxyethyl methacrylate ester, have been prepared and their chromatographic performance tested for the separation of small molecules in the reversed phase. While addition of the C60-fullerene monomer to the glycidyl methacrylate-based monolith enhanced column efficiency 18-fold, to 85,000 plates/m at a linear velocity of 0.46 mm/s and a retention factor of 2.6, when compared to the parent monolith, the use of butyl methacrylate together with the carbon nanostructured monomer afforded monolithic columns with an efficiency for benzene exceeding 110,000 plates/m at a linear velocity of 0.32 mm/s and a retention factor of 4.2. This high efficiency is unprecedented for separations using porous polymer monoliths operating in an isocratic mode. Optimization of the chromatographic parameters affords near baseline separation of 6 alkylbenzenes in 3 minutes with an efficiency of 64,000 plates/m. The presence of 1 wt% or more of water in the polymerization mixture has a large effect on both the formation and reproducibility of the monoliths. Other important factors such as nitrogen exposure, polymerization conditions, capillary filling method, and sonication parameters were all found to be important factors in producing highly efficient and reproducible monoliths.

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Carbon Nanotube Stationary Phase in a Microfabricated Column for High-Performance Gas Chromatography

Cited by 9 publications

References 14 publications

Gas Chromatography

Gas Chromatography

Micro Gas Preconcentrator Made of a Film of Single-Walled Carbon Nanotubes

Porous Polymer Monoliths Functionalized through Copolymerization of a C60 Fullerene-Containing Methacrylate Monomer for Highly Efficient Separations of Small Molecules

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