Journal
NANO ENERGY
Volume 95, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2022.106970
Keywords
Polyaniline-nanospines; Hierarchical nanofibrous membrane; Flexible piezoresistive pressure sensor; Physiological signal monitoring; Ultra-high sensitivity; Broad pressure range
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Funding
- National Research Foundation of Korea - Korea government (MSIT) [NRF-2020R1A2C2012820]
- Bio & Medical Technology Development Program [NRF-2017M3A9F1031270]
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This paper proposes a new type of highly sensitive pressure sensor based on hybridized nanofibrous membrane technology, which overcomes the limitations of existing piezoresistive sensors and has high sensitivity and wide pressure range response. The sensor has broad application prospects in the field of electronic skin and wearable electronic devices.
The development of a highly sensitive pressure sensor with a wide linear range is an emerging technological goal in the area of electronic skin (e-skin). Several studies have focused on imitating tactile perception closer to natural skin, however, there remains a great challenge in developing a complete artificial tactile sensory system with high sensitivity over a broad pressure range. Herein, a highly sensitive hybridized nanofibrous membrane based pressure sensor is newly proposed to overcome the limitation of the existing piezoresistive pressure sensor by improving the sensitivity and working range. As a primary sensing material, polyaniline (PANI)-nanospines are uniformly deposited throughout the hybrid hierarchical nanofibers to achieve a high sensitivity (179.1 kPa-1) with a low detection limit (1.2 Pa). Additionally, the highly deformable hierarchical nanofibrous membranes enables linear response over a broad pressure range (0 50 kPa) with a high durability (10,000 cycles). These results indicate that the fabricated pressure sensor has a broad application perspective, particularly in e skins and wearable electronic devices.
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