Journal
ADVANCED MATERIALS
Volume 30, Issue 33, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201802516
Keywords
flexible sensory arrays; flexible threshold switches; highly nonlinear; matrix addressing; nanocontacts
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Funding
- National Research Foundation (NRF)
- Prime Minister's office, Singapore, under its NRF Investigatorship [NRF2016NRF-NRF1001-21]
- Singapore Ministry of Education [MOE2014-T2-2-140, MOE2015-T2-2-60]
- K. C. Wong Education Foundation
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [648635]
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The increasing need for smart systems in healthcare, wearable, and soft robotics is creating demand for low-power sensory circuits that can detect pressure, temperature, strain, and other local variables. Among the most critical requirements, the matrix circuitry to address the individual sensor device must be sensitive, immune to disturbances, and flexible within a high-density sensory array. Here, a strategy is reported to enhance the matrix addressing of a fully integrated flexible sensory array with an improvement of 10(8) fold in the maximum readout value of impedance by a bidirectional threshold switch. The threshold switch shows high flexibility (bendable to a radius of about 1 mm) and a high nonlinearity of approximate to 10(10) by using a nanocontact structure strategy, which is revealed and validated by molecular dynamics simulations and experiments at variable mechanical stress. Such a flexible electronic switch enables a new generation of large-scale flexible and stretchable electronic and optoelectronic systems.
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