Highly Stretchable and Sensitive Unidirectional Strain Sensor via Laser Carbonization
Highly Stretchable and Sensitive Unidirectional Strain Sensor via Laser Carbonization
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DOI：
10.1021/am509087u
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发表时间：
2015-03-04
影响因子：
9.5
通讯作者：
Ziaie, Babak
中科院分区：
文献类型：
--
作者：
Rahimi, Rahim;Ochoa, Manuel;Ziaie, Babak
在本文中，我们提出了一种简单、低成本的制造高度可伸缩(高达100%应变)和高灵敏度(高达20000的量规系数)应变传感器的技术。我们的技术基于将聚酰亚胺等热固性聚合物通过选择性激光热解产生的碳化图案转移和嵌入到弹性基材(例如PDMS或Ecoflex)中。嵌入的碳化材料由部分排列的石墨烯和碳纳米管(CNT)颗粒组成，并显示出尖锐的方向各向异性，这使得制造非常坚固、高度可拉伸的单向应变传感器成为可能。热解碳区的拉曼光谱表明，在最佳的激光条件下，可以得到方阻低至60欧加/平方英寸的多孔性的碳纳米/微米粒子。利用这一技术，我们制作了一种能够实时测量手指运动的仪表化乳胶手套。
In this paper, we present a simple and low-cost technique for fabricating highly stretchable (up to 100% strain) and sensitive (gauge factor of up to 20 000) strain sensors. Our technique is based on transfer and embedment of carbonized patterns created through selective laser pyrolization of thermoset polymers, such as polyimide, into elastomeric substrates (e.g., PDMS or Ecoflex). Embedded carbonized materials are composed of partially aligned graphene and carbon nanotube (CNT) particles and show a sharp directional anisotropy, which enables the fabrication of extremely robust, highly stretchable, and unidirectional strain sensors. Raman spectrum of pyrolized carbon regions reveal that under optimal laser settings, one can obtain highly porous carbon nano/microparticles with sheet resistances as low as 60 Omega/square. Using this technique, we fabricate an instrumented latex glove capable of measuring finger motion in real-time.