Vapor Detection Using Resonating Microcantilevers

T. Thundat; G. Y. Chen; R. J. Warmack; D. P. Allison; E. A. Wachter

doi:10.1021/ac00099a006

Vapor Detection Using Resonating Microcantilevers

T. Thundat, G. Y. Chen, R. J. Warmack, D. P. Allison, E. A. Wachter

Research output: Contribution to journal › Article › peer-review

170 Scopus citations

Abstract

Changes in the resonance frequency of microcantilevers due to adsorption of analyte vapor on exposed surfaces is shown to provide a novel means for detection of the analyte. Frequency changes can be due to mass loading or adsorption-induced changes in cantilever spring constant Sensitization to water vapor is demonstrated by coating cantilever surfaces with hygroscopic materials, such as phosphoric acid. Cantilevers coated with a thin gelatin film exhibit high sensitivity and a linear response with changes in relative humidity, apparently due to changes in the spring constant of the coated cantilever. In addition to frequency response, static cantilever deflection also changes with vapor adsorption. Both phenomena can be used to detect adsorbed vapors with picogram mass resolution.

Original language	English
Pages (from-to)	519-521
Number of pages	3
Journal	Analytical Chemistry
Volume	67
Issue number	3
DOIs	https://doi.org/10.1021/ac00099a006
State	Published - 1995
Externally published	Yes

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title = "Vapor Detection Using Resonating Microcantilevers",

abstract = "Changes in the resonance frequency of microcantilevers due to adsorption of analyte vapor on exposed surfaces is shown to provide a novel means for detection of the analyte. Frequency changes can be due to mass loading or adsorption-induced changes in cantilever spring constant Sensitization to water vapor is demonstrated by coating cantilever surfaces with hygroscopic materials, such as phosphoric acid. Cantilevers coated with a thin gelatin film exhibit high sensitivity and a linear response with changes in relative humidity, apparently due to changes in the spring constant of the coated cantilever. In addition to frequency response, static cantilever deflection also changes with vapor adsorption. Both phenomena can be used to detect adsorbed vapors with picogram mass resolution.",

author = "T. Thundat and Chen, {G. Y.} and Warmack, {R. J.} and Allison, {D. P.} and Wachter, {E. A.}",

year = "1995",

doi = "10.1021/ac00099a006",

language = "English",

volume = "67",

pages = "519--521",

journal = "Analytical Chemistry",

issn = "0003-2700",

publisher = "American Chemical Society",

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T1 - Vapor Detection Using Resonating Microcantilevers

AU - Thundat, T.

AU - Chen, G. Y.

AU - Warmack, R. J.

AU - Allison, D. P.

AU - Wachter, E. A.

PY - 1995

Y1 - 1995

N2 - Changes in the resonance frequency of microcantilevers due to adsorption of analyte vapor on exposed surfaces is shown to provide a novel means for detection of the analyte. Frequency changes can be due to mass loading or adsorption-induced changes in cantilever spring constant Sensitization to water vapor is demonstrated by coating cantilever surfaces with hygroscopic materials, such as phosphoric acid. Cantilevers coated with a thin gelatin film exhibit high sensitivity and a linear response with changes in relative humidity, apparently due to changes in the spring constant of the coated cantilever. In addition to frequency response, static cantilever deflection also changes with vapor adsorption. Both phenomena can be used to detect adsorbed vapors with picogram mass resolution.

AB - Changes in the resonance frequency of microcantilevers due to adsorption of analyte vapor on exposed surfaces is shown to provide a novel means for detection of the analyte. Frequency changes can be due to mass loading or adsorption-induced changes in cantilever spring constant Sensitization to water vapor is demonstrated by coating cantilever surfaces with hygroscopic materials, such as phosphoric acid. Cantilevers coated with a thin gelatin film exhibit high sensitivity and a linear response with changes in relative humidity, apparently due to changes in the spring constant of the coated cantilever. In addition to frequency response, static cantilever deflection also changes with vapor adsorption. Both phenomena can be used to detect adsorbed vapors with picogram mass resolution.

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DO - 10.1021/ac00099a006

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SN - 0003-2700

VL - 67

SP - 519

EP - 521

JO - Analytical Chemistry

JF - Analytical Chemistry

IS - 3

ER -

Vapor Detection Using Resonating Microcantilevers

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