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Title: Highly sensitive and wide linear-response pressure sensors featuring zero standby power consumption under bending conditions
Authors: Yi, Chenghan
Hou, Yuxin
He, Ke
Li, Weimin
Li, Nianci
Wang, Zhongguo
Yang, Bing
Xu, Shuda
Wang, Heng
Gao, Chuanzeng
Wang, Zhengyan
Gu, Guoqiang
Wang, Zhixun
Wei, Lei
Yang, Chunlei
Chen, Ming
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Yi, C., Hou, Y., He, K., Li, W., Li, N., Wang, Z., Yang, B., Xu, S., Wang, H., Gao, C., Wang, Z., Gu, G., Wang, Z., Wei, L., Yang, C. & Chen, M. (2020). Highly sensitive and wide linear-response pressure sensors featuring zero standby power consumption under bending conditions. ACS Applied Materials and Interfaces, 12(17), 19563-19571.
Project: MOE2015-T2-2-010
Journal: ACS Applied Materials and Interfaces 
Abstract: The ability of a flexible pressure sensor to possess zero power consumption in standby mode, high sensitivity, and wide linear-response range is critical in real flexible matrix-based scenes. However, when the conventional flexible pressure sensors are attached on a curved surface, a pseudosignal response is generated because of the normal stress, resulting in a short linear-response range. Here, a flexible piezoresistive pressure sensor with high performance, zero standby power consumption is demonstrated. The flexible pressure sensor is fabricated from polydimethylsiloxane (PDMS)/carbon black (CB), patterned polyimide (PI) spacer layer, and laser-induced graphene (LIG) interdigital electrodes. Benefiting from the hierarchical structure and sufficient roughness of PDMS/CB and LIG interdigital electrodes, the proposed pressure sensors (PDMS/CB/PI/LIG) exhibit high sensitivity (43 kPa-1), large linear-response range (0.4-13.6 kPa), fast response (<40 ms), and long-term cycle stability (>1800 cycles). The resulting pressure sensor also features zero standby power consumption merit under certain bending conditions (bending angle: 0-5o). Furthermore, the effect of the hole diameter of the PI spacer layer on the performance of the pressure sensors is experimentally and theoretically investigated. As a proof of concept, a bioinspired artificial haptic neuron system has been successfully equipped to modulate the number of lit LED lights. The proposed high-performance pressure sensor has promising potential to be used in flexible and wearable electronics, especially for the applications in actual flexible matrix-based scenes.
ISSN: 1944-8244
DOI: 10.1021/acsami.0c02774
Rights: © 2020 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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