Abstract
A highly transparent and flexible percolative composite with magnetic reduced graphene oxide@nickel nanowire (mGN) fillers in EcoFlex matrix is proposed as a 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 microdome 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 a low device-to-device variation of 3.74%, which provides a new way to achieve transparent, highly sensitive, and large-scale electronic skin.
| Original language | English |
|---|---|
| Pages (from-to) | 48331-48340 |
| Number of pages | 10 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 11 |
| Issue number | 51 |
| DOIs | |
| Publication status | Published - 26 Dec 2019 |
Keywords
- excluded volume
- hot embossing
- percolative composite
- piezoresistive sensors
- transparent
ASJC Scopus subject areas
- General Materials Science
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