期刊
APPLIED PHYSICS LETTERS
卷 93, 期 25, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3056114
关键词
bending; cantilevers; elastic moduli; force sensors; micromechanical devices; microsensors; viscoelasticity
资金
- National Science Foundation [CMMI 0239163, CMMI-0700688, CMMI-0826191, NSC96-2628E-006-006-MY3]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0826191] Funding Source: National Science Foundation
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.
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