| Title: | Sub-ppm detection of vapors using piezoresistive microcantilever array sensors |
| Author(s): | Yoshikawa G; Lang HP; Akiyama T; Aeschimann L; Staufer U; Vettiger P; Aono M; Sakurai T; Gerber C; |
| Address: | "National Center of Competence for Research in Nanoscience (NCCR), Department of Physics, University of Basel, 4056 Basel, Switzerland. Genki.Yoshikawa@unibas.ch" |
| DOI: | 10.1088/0957-4484/20/1/015501 |
| ISSN/ISBN: | 1361-6528 (Electronic) 0957-4484 (Linking) |
| 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" |
| Notes: | "PubMed-not-MEDLINEYoshikawa, Genki Lang, Hans-Peter Akiyama, Terunobu Aeschimann, Laure Staufer, Urs Vettiger, Peter Aono, Masakazu Sakurai, Toshio Gerber, Christoph eng Research Support, Non-U.S. Gov't England 2009/05/07 Nanotechnology. 2009 Jan 7; 20(1):015501. doi: 10.1088/0957-4484/20/1/015501. Epub 2008 Dec 5" |
