Detection of Organic Mercaptan Vapors Using Thin Films of Alkylamine-Passivated Gold Nanocrystals

Briglin, Shawn M.
Gao, Ting
Lewis, Nathan S.

Publication date

January 2004

Publisher

American Chemical Society (ACS)

Abstract

Alkylamine-capped gold nanocrystals have been used as chemically sensitive resistors for the detection of volatile organic mercaptan vapors. Thin (<1 × 10^(-4) cm) films of dodecylamine-capped, 6−7 nm diameter Au nanocrystals produced dc electrical resistances of 10 kΩ to 10 MΩ when deposited onto interdigitated Au/Cr electrodes. These chemiresistive vapor detectors displayed a reversible increase in dc electrical resistance when exposed to non-thiol-containing vapors such as water, acetone, or toluene delivered at a constant fraction (0.05) of their vapor pressure, with relative differential resistance responses to these vapors of ≈5% under such conditions. In contrast, the amine-capped Au nanocrystal films exhibited a much larger, irrever...

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Detection of Organic Mercaptan Vapors Using Thin Films of Alkylamine-Passivated Gold Nanocrystals

Abstract

Extracted data

Detection of Organic Mercaptan Vapors Using Thin Films of Alkylamine-Passivated Gold Nanocrystals

Abstract

Extracted data

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