Strain-Dependent Resistance of PDMS and Carbon Nanotubes Composite Microstructures
Strain-Dependent Resistance of PDMS and Carbon Nanotubes Composite Microstructures
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DOI：
10.1109/tnano.2010.2060350
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发表时间：
2010-09-01
影响因子：
2.4
通讯作者：
Choi, Jin-Woo
中科院分区：
文献类型：
--
作者：
Liu, Chao-Xuan;Choi, Jin-Woo
我们报告了一种由弹性体聚二甲基硅氧烷（PDMS）和多壁碳纳米管组成的微图案化纳米复合材料的发展，以及其对大的机械变形的电阻响应。将纳米复合材料的微结构嵌入未填充的PDMS中作为应变传感器，并通过微接触印刷和丝网印刷方法简单地制造器件。当经受大的拉伸应变（>45%）时，纳米复合材料传感器显示电阻的显著变化。此外，循环加载的样品产生可重复的电阻响应。一个有趣的观察滞后效应证实了多个测试和可能的潜在机制进行了讨论。作为一种灵活的和生物相容的弹性体，微图案化的纳米复合材料可以证明在传感生物力学应变和其他各种应用。
We report the development of a micropatterned nanocomposite composed of elastomer poly(dimethylsiloxane) (PDMS) and multiwalled carbon nanotubes, and its resistive response to large mechanical deformations. Microstructures of nanocomposite were embedded into unfilled PDMS to work as a strain sensor and devices were fabricated with simplicity through microcontact printing and screen-printing approaches. When subject to large tensile strains (>45%), nanocomposite sensors revealed significant change in electrical resistance. Also, cyclic loadings of sample yielded repeatable resistive responses. An interesting observation of hysteresis effect was confirmed with multiple tests and possible underlying mechanisms were discussed. As a flexible and biocompatible elastomer, the micropatterned nanocomposite could prove useful in sensing biomechanical strains and other various applications.