Synergistic control of engineered nanostructures toward sensitivity and reliability of a flexible piezoresistive pressure sensoropen access
- Authors
- Hwang, Taehoon; Seo, Jungyoon; Ko, Eun; Yang, Chanwoo; Lee, Hwa Sung
- Issue Date
- Jan-2023
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- Materials Advances, v.4, no.5, pp.1326 - 1334
- Indexed
- SCOPUS
- Journal Title
- Materials Advances
- Volume
- 4
- Number
- 5
- Start Page
- 1326
- End Page
- 1334
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187417
- DOI
- 10.1039/D2MA00987K
- ISSN
- 2633-5409
- Abstract
- Flexible pressure sensors are among the most important flexible electronics used in various electronic skin applications, including artificial intelligence, human-machine interfaces, health monitoring, and soft robotics. To obtain piezoresistive pressure sensors with improved sensitivity and reliability in sensing performance, we investigated the correlation between the pressure-sensing performance of the sensors and the nanostructures of the sensing media with controlled nanopatterned templates. To compare the effects of nanostructures on the pressure sensor performances, two nanorod-patterned sensing media with different nanoscales were used: one was a finely nanopatterned sensing medium, while the other was a relatively large nanopatterned medium using different anodized aluminum oxide (AAO) templates, named shAAO and bhAAO, respectively. The piezoresistive pressure sensor using the shAAO-replicated sensing medium exhibited better sensitivity, faster response/recovery rate, and better sensing reliability than the bhAAO-pressure sensor. This result suggests that optimizing the nanopatterned structures should be considered in terms of the interdigitated contact that proceeds between the two electrodes to obtain high-performance pressure sensors when designing nanopatterned sensing media applied through face-to-face assembly of the nanostructured substrate.
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