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

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Force touch sensors have received a great deal of attention for various applications owing to their versatile ability to detect touch and pressure. To demonstrate high-performance force touch sensors, numerous studies have been performed, focusing on high sensitivity, transparency, and mechanical durability against bending. However, it is still challenging to apply force touch sensors in flexible applications, because their sensing performance is subject to change and degraded by induced mechanical stress and deformation when the device is bent. Here, a high-performance and transparent nanoforce touch sensor with bending-insensitivity is reported. This is achieved by developing a thin, flexible, and transparent hierarchical nanocomposite film, which is composed of a nanostructured plastic base, coplanar electrodes, and a dielectric polymer layer with silver nanoparticles. The fabrication process is simple that high manufacturing repeatability, uniformity, and reliability are achieved on a large-area (8 in.) scale. The fabricated device shows a pressure sensitivity of 0.036 kPa(-1) with high transparency (83%) in a pressure range up to 3 kPa. In particular, its thin thickness (45 mu m) and the coplanar electrode enable to achieve excellent insensitivity to the bending with a radius of curvature of 4 mm more than 10 000 times.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2018-10
Language
English
Article Type
Article
Keywords

FLEXIBLE PRESSURE SENSOR; CARBON NANOTUBES; ELECTRONIC SKIN; CAPACITIVE PRESSURE; STRAIN; CONDUCTORS; MATRIX

Citation

ADVANCED FUNCTIONAL MATERIALS, v.28, no.42

ISSN
1616-301X
DOI
10.1002/adfm.201804721
URI
http://hdl.handle.net/10203/246695
Appears in Collection
EE-Journal Papers(저널논문)
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