Viscoelastic mechanical behavior of soft microcantilever-based force sensors

被引：27
|
作者：
Lin, I-Kuan [1 ]
Liao, Yen-Ming [2 ]
Liu, Yan [1 ]
Ou, Kuang-Shun [2 ]
Chen, Kuo-Shen [2 ]
Zhang, Xin [1 ]
机构：
[1] Boston Univ, Dept Mech Engn, Boston, MA 02215 USA
[2] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 701, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 25期
基金：
美国国家科学基金会;
关键词：
bending; cantilevers; elastic moduli; force sensors; micromechanical devices; microsensors; viscoelasticity;
D O I：
10.1063/1.3056114
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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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页数：3
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