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Description:

Nanomechanical sensors and their arrays have attracted significant attention for detecting, distinguishing, and identifying target analytes, especially complex mixtures of odors. In the static mode operation, sensing signals are obtained by a concen-tration-dependent sorption-induced mechanical strain/stress. Understanding of the dynamic responses is crucial for develop-ing practical artificial olfaction; however, the analytical formulations are still limited to single-component analytes. Here, we derive an analytical model of viscoelastic material-based static mode nanomechanical sensing for multi-component analytes by extending the theoretical model via solving differential equations. The present model can reduce the dynamic responses to the multi-component target analytes observed in the experimental signal responses. Moreover, the use of optimized fitting parameters extracted from pure vapors with viscoelastic parameters allows us to predict the concentration of each analyte in the multi-component system.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: nanomechanical sensors, sorption kinetics, viscoelastic stress relaxation

Date published: 2025-09-09

Publisher: American Chemical Society (ACS)

Journal:

• Analytical Chemistry (ISSN: 00032700) vol. 97 issue. 35 p. 19306-19312

Funding:

• Japan Society for the Promotion of Science 18H04168
• Japan Society for the Promotion of Science 20K20554
• Japan Society for the Promotion of Science 22K05324
• Japan Society for the Promotion of Science 25K08830
• Cabinet Office, Government of Japan
• National Institute for Materials Science

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1021/acs.analchem.5c03397

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Updated at: 2025-11-13 16:30:13 +0900

Published on MDR: 2025-11-13 16:24:28 +0900