Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 48, Pages 54035-54040Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c13637
Keywords
GFET; biodegradable pressure sensor; glycine; piezoelectric transducer layer; electronic skin; low voltage transistor
Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/R029644/1, EP/R03480X/1, EP/R026173/1]
- European Commission through Marie Sklodowska-Curie Actions Fellowship-ELECTROHEAL [H2020-MSCA-IF-2016-753633]
- EPSRC [EP/R029644/1, EP/R026173/1, EP/R03480X/1] Funding Source: UKRI
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Pressure sensors form the basic building block for realization of an electronic or tactile skin used in prothesis, robotics, and other similar applications. This paper presents a device consisting of biodegradable piezoelectric material based dynamic pressure sensor coupled with a graphene field-effect-transistor (GFET) operated at very low voltage (50 mV). The device has a biodegradable beta-glycine/chitosan composite based metal-insulator-metal (MIM) structure connected with GFET in an extended gate configuration. The developed device shows a sensitivity of 2.70 x 10(-4) kPa(-1) for a pressure range of 5-20 kPa and 7.56 x 10(-4) kPa(-1) for a pressure range between 20 and 35 kPa. A distinctive feature of the presented device is its very low operation voltage, which offers a significant advantage toward the development of energy efficient large-area electronic skin. Further, the biodegradability of piezoelectric material makes the presented sensors useful in terms of reduced electronic waste, which is currently another growing area of interest.
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