Viscoelastic mechanical behavior of soft microcantilever-based force sensors

I. Kuan Lin, Yen Ming Liao, Yan Liu, Kuang Shun Ou, Kuo Shen Chen, Xin Zhang

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Polydimethylsiloxane (PDMS) microcantilevers have been used as force sensors for studying cellular mechanics by converting their displacements to cellular mechanical forces. However, PDMS is an inherently viscoelastic material and its elastic modulus changes with loading rates and elapsed time. Therefore, the traditional approach to calculating cellular mechanical forces based on elastic mechanics can result in errors. This letter reports a more in-depth method for viscoelastic characterization, modeling, and analysis associated with the bending behavior of the PDMS microcantilevers. A viscoelastic force conversion model was developed and validated by proof-of-principle bending tests.

Original languageEnglish
Article number251907
JournalApplied Physics Letters
Volume93
Issue number25
DOIs
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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