DataVXACS Applied Electronic MaterialsPaper
journal article·2022-12-27

Nanofibrous Matrix Mediated Ultrasensitive Flexible Strain Sensor for Subtle Human Motion Monitoring

Zeying Zhang, Qi Zhang, Ruobo Peng, Li Xue, Cuiling Zhang, Wei Su, Guoxu Zhao, Guohua Dong, Niancai Peng, Zhuangde Jiang, Ziyao Zhou, Xiaohui Zhang

ACS Applied Electronic Materials· Volume 4· Issue 12
Publisher page
Source abstract

Abstract

Flexible strain sensors have attracted extensive research interest in health monitoring and early diagnosis owing to their superiority in continuous measurement of physiological signals. However, the design of flexible sensors with high sensitivity for subtle strain measurement coupled with biocompatibility, breathability, and eco-friendly properties is still challenging. In this study, a facile and universal approach was developed for the preparation of highly sensitive, biocompatible, and eco-friendly flexible strain sensors in reduced graphene oxide (rGO)/silk composites. The microcrack structures generated in rGO functional layers were achieved by vacuum filtration of GO onto silk nanofibrous matrices followed by a reduction process. The optimized flexible sensor exhibited high sensitivity with a gauge factor (GF) of 436 and 204 at a stretching strain of 8–8.7% and a bending strain of 0.12%, respectively. The sensor also revealed a superfast response of 8.8 ms, excellent durability for over 2000 cycles of bending, and waterproof ability up to 80 °C after 9 cycles. The degradability of the silk substrates enables the recycling of conductive materials, leading to eco-friendly sensor materials. The optimized rGO/silk sensor was able to sensitively and stably detect physiological signals with subtle strain changes (voices, pulse, and airflow), demonstrating great potential for use in flexible strain sensing of human health monitoring and medical diagnostics.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsBiomaterialsComposites

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Conducting polymers and applications · Gas Sensing Nanomaterials and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Center for Mitochondrial Biology and Medicine, School of Life Science and Technology, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Key Laboratory for Biomedical Testing and High-end Equipment, Xi’an Jiaotong University, Xi’an, Shannxi 710049, P.R. China

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Manufacturing Systems Engineering, The International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an, Shannxi 710049, P.R. China

School of Material Science and Chemical Engineering, Xi’an Technological University, Xi’an, Shaanxi 710021, P.R. China

International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 7100049, P.R. China

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China

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