A colorimetric receptor combined with a microcantilever sensor for explosive vapor detection

Journal article (2011)
Faculty
Electrical Engineering, Mathematics and Computer Science (EEMCS) (TU Delft)
Copyright: American Institute of Physics
DOI: https://doi.org/doi:10.1063/1.3567011
Colorimetry Micromechanical devices Chemical sensors
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Published Date

22-03-2011

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Source:

Applied Physics Letters, 98 (12), 2011

ISSN:

0003-6951

ISBN:

0003-6951

Source:

http://link.aip.org/link/doi/10.1063/1.3567011

Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

Substantial effort has been devoted to the synthesis of molecular receptors that can function as chemosensors for nitroaromatic explosives. In spite of several advantages, these receptors suffer from low sensitivity and difficulties translating the response into the gas phase. We have combined tetrathiafulvalene-functionalized calix[4]pyrrole, a colorimetric receptor, with a polyimide microcantilever, that includes a mechanical stress sensing element. The resulting system is capable of detecting 10 ppb trinitrobenzene vapor. This represents a 30-fold improvement relative to the receptor in halogenated solvents, suggesting that this approach can provide a solution to translating the chemical response of colorimetric chemosensors into practical devices.

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