Industrial Grade, Bending‐Insensitive, Transparent Nanoforce Touch Sensor via Enhanced Percolation Effect in a Hierarchical Nanocomposite Film

• DOI: 10.1002/adfm.201804721
• Publication Date: 2018-09-06T10:17:27Z
• Authors: Jae‐Young Yoo; Min‐Ho Seo; Jae‐Shin Lee; Kwang‐Wook Choi; Min‐Seung Jo; Jun‐Bo Yoon
• Keywords: Bend radius; Tactile sensor

Abstract Force touch sensors have received a great deal of attention for various applications owing to their versatile ability detect and pressure. To demonstrate high‐performance force sensors, numerous studies been performed, focusing on high sensitivity, transparency, mechanical durability against bending. However, it is still challenging apply in flexible applications, because sensing performance subject change degraded by induced stress deformation when the device bent. Here, transparent nanoforce sensor with bending‐insensitivity reported. This achieved developing thin, flexible, hierarchical nanocomposite film, which composed nanostructured plastic base, coplanar electrodes, dielectric polymer layer silver nanoparticles. The fabrication process simple that manufacturing repeatability, uniformity, reliability are large‐area (8 in.) scale. fabricated shows pressure sensitivity 0.036 kPa −1 transparency (83%) range up 3 kPa. In particular, its thin thickness (45 µm) electrode enable achieve excellent insensitivity bending radius curvature 4 mm more than 10 000 times.