Magnetic Assisted, Transparent and Flexible Percolative Composite for Highly Sensitive Piezoresistive Sensor via Hot Embossing Technology.
Magnetic Assisted, Transparent and Flexible Percolative Composite for Highly Sensitive Piezoresistive Sensor via Hot Embossing Technology.
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DOI：
10.1021/acsami.9b16215
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发表时间：
2019-11
影响因子：
9.5
通讯作者：
Shan Wang;Guorui Chen;S. Niu;Kaifeng Chen;Tian Gan;Zongrong Wang;Hongzhu Wang;P. Du;C. Leung;S. Qu
中科院分区：
文献类型：
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作者：
Shan Wang;Guorui Chen;S. Niu;Kaifeng Chen;Tian Gan;Zongrong Wang;Hongzhu Wang;P. Du;C. Leung;S. Qu
提出了一种高透明和柔性的磁性还原氧化石墨烯@镍纳米线（mGN）填料的Ecoflex矩阵的复合材料作为敏感层，以制造高性能的柔性压阻传感器。大的排除体积和排列的mGN填料有助于低逾渗阈值（0.27体积%）的mGN-Ecoflex复合材料，导致0.003 S m-1的高电导率，71.8%的光学透射率和122.8 kPa的低杨氏模量。采用热压成型技术制备了大尺寸传感器微球模板，并利用COMSOL Multiphysics优化了传感器性能。实验制作的压阻式传感器具有上级的平均灵敏度为1302.1 kPa-1，器件间变化率为3.74%，为实现透明、高灵敏、大规模的电子皮肤提供了一种新的途径。
A highly transparent and flexible percolative composite with magnetic reduced graphene oxide@nickel nanowires (mGN) fillers in Ecoflex matrix is proposed as sensing layer to fabricate high performance flexible piezoresistive sensors. Large excluded volume and alignment of mGN fillers contribute to low percolation threshold (0.27 vol%) of mGN-Ecoflex composites, leading to high electrical conductivity of 0.003 S m-1, optical transmittance of 71.8% and low Young's modulus of 122.8 kPa. Large scale micro-dome templates for sensors are prepared by hot embossing technology cost-effectively and COMSOL Multiphysics is utilized to optimize the sensor performances. Piezoresistive sensors fabricated experimentally show superior average sensitivity of 1302.1 kPa-1 with low device-to-device variation of 3.74%, which provide a new way to achieve transparent, highly sensitive and large-scale electronic skin.