Abstract
Chemically sensitive resistors have been fabricated from composites of carbon black and low volatility, nonpolymeric, organic molecules such as propyl gallate, lauric acid, and dioctyl phthalate. Sorption of organic vapors into the nonconductive phase of such composites produced rapid and reversible changes in the relative differential resistance response of the sensing films. Arrays of these sensors, in which each sensing film was comprised of carbon black and a chemically distinct nonpolymeric organic molecule or blend of organic molecules, produced characteristic response patterns upon exposure to a series of different organic test vapors. The use of nonpolymeric sorption phases allowed fabrication of sensors having a high density of randomly oriented functional groups and provided excellent discrimination between analytes. By comparison to carbon black-polymer composite vapor sensors and sensor arrays, such sensors provided comparable detection limits as well as enhanced clustering and enhanced resolution ability between test analytes.
| Original language | English |
|---|---|
| Pages (from-to) | 5193-5202 |
| Number of pages | 10 |
| Journal | Chemistry of Materials |
| Volume | 18 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - Oct 31 2006 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
Cite this
Chemiresistors for array-based vapor sensing using composites of carbon black with low volatility organic molecules. / Gao, Ting; Woodka, Marc D.; Brunschwig, Bruce S.; Lewis, Nathan S.
In: Chemistry of Materials, Vol. 18, No. 22, 31.10.2006, p. 5193-5202.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Chemiresistors for array-based vapor sensing using composites of carbon black with low volatility organic molecules
AU - Gao, Ting
AU - Woodka, Marc D.
AU - Brunschwig, Bruce S.
AU - Lewis, Nathan S
PY - 2006/10/31
Y1 - 2006/10/31
N2 - Chemically sensitive resistors have been fabricated from composites of carbon black and low volatility, nonpolymeric, organic molecules such as propyl gallate, lauric acid, and dioctyl phthalate. Sorption of organic vapors into the nonconductive phase of such composites produced rapid and reversible changes in the relative differential resistance response of the sensing films. Arrays of these sensors, in which each sensing film was comprised of carbon black and a chemically distinct nonpolymeric organic molecule or blend of organic molecules, produced characteristic response patterns upon exposure to a series of different organic test vapors. The use of nonpolymeric sorption phases allowed fabrication of sensors having a high density of randomly oriented functional groups and provided excellent discrimination between analytes. By comparison to carbon black-polymer composite vapor sensors and sensor arrays, such sensors provided comparable detection limits as well as enhanced clustering and enhanced resolution ability between test analytes.
AB - Chemically sensitive resistors have been fabricated from composites of carbon black and low volatility, nonpolymeric, organic molecules such as propyl gallate, lauric acid, and dioctyl phthalate. Sorption of organic vapors into the nonconductive phase of such composites produced rapid and reversible changes in the relative differential resistance response of the sensing films. Arrays of these sensors, in which each sensing film was comprised of carbon black and a chemically distinct nonpolymeric organic molecule or blend of organic molecules, produced characteristic response patterns upon exposure to a series of different organic test vapors. The use of nonpolymeric sorption phases allowed fabrication of sensors having a high density of randomly oriented functional groups and provided excellent discrimination between analytes. By comparison to carbon black-polymer composite vapor sensors and sensor arrays, such sensors provided comparable detection limits as well as enhanced clustering and enhanced resolution ability between test analytes.
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U2 - 10.1021/cm060905x
DO - 10.1021/cm060905x
M3 - Article
VL - 18
SP - 5193
EP - 5202
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 22
ER -