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Sub-ppm detection of vapors using piezoresistive microcantilever array sensors

Yoshikawa, Genki and Lang, Hans-Peter and Akiyama, Terunobu and Aeschimann, Laure and Staufer, Urs and Vettiger, Peter and Aono, Masakazu and Sakurai, Toshio and Gerber, Christoph. (2009) Sub-ppm detection of vapors using piezoresistive microcantilever array sensors. Nanotechnology, 20 (1). 015501.

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Official URL: http://edoc.unibas.ch/dok/A5251974

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Abstract

The performance of microfabricated piezoresistive cantilever array sensors has been evaluated using various vapors of volatile organic compounds including alkanes with different chain length from 5 (n-pentane) to 14 (n-tetradecane). We demonstrate that piezoresistive microcantilever array sensors have the selectivity of discriminating individual alkanes in a homologous series as well as common volatile organic compounds according to principal component analysis. We developed a new method to evaluate the sensitivity, taking advantage of the low vapor pressures of alkanes with longer chains, such as n-dodecane, n-tridecane and n-tetradecane, under saturated vapor conditions. This method reveals sub-ppm sensitivity and the cantilever response is found to follow the mass of evaporated analytes as calculated using a quantitative model based on the Langmuir evaporation model.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Lang, Hans Peter
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
ISSN:0957-4484
e-ISSN:1361-6528
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:16 Feb 2017 07:40
Deposited On:22 Mar 2012 13:57

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