Large-Area, Crosstalk-Free, Flexible Tactile Sensor Matrix Pixelated by Mesh Layers

• DOI: 10.1021/acsami.0c21671
• Publication Date: 2021-03-08T13:54:38Z
• Authors: Kyubin Bae; Jinho Jeong; Jongeun Choi; Soonjae Pyo; Jongbaeg Kim
• Keywords: Tactile sensor; Electronic Skin; Polydimethylsiloxane; Sensor array

Tactile sensor arrays have attracted considerable attention for their use in diverse applications, such as advanced robotics and interactive human–machine interfaces. However, conventional tactile suffer from electrical crosstalk caused by current leakages between the cells. The approaches that been proposed thus far to overcome this issue require complex rectifier circuits or a serial fabrication process. This article reports flexible array fabricated through batch process using mesh. A carbon nanotube–polydimethylsiloxane composite is used form an of sensing cells mesh simple "dip-coating" cured into concave shape. contact area electrode changes significantly under pressure, resulting excellent sensitivity (5.61 kPa–1) over wide range pressure up 600 kPa. separates arranged prevent connection adjacent simultaneously connects each cell mechanically. Additionally, shows superior durability compared with previously reported sensors because acts support beam. Furthermore, successfully utilized Braille reader via information processing based on machine learning.