Peihua Xu , Lida Zhu , Baoquan Chang , Song Wang , Yang Wang , Zhongtan Zhang , Huanyu Yang , Chengkuo Lee
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引用次数: 0
Abstract
Multifunctional flexible sensors play a pivotal role in applications requiring intelligent tactile, such as soft robotics and prosthetics. However, their development is often hindered by complex fabrication processes and high costs. This study presents a simple, scalable strategy for fabricating a multifunctional flexible sensor by harnessing natural forces—evaporation and gravity. A thermoplastic polyurethane elastomer/carbon nanotube (CNT) sensing dielectric with a hollow dome structure is prepared via natural evaporation. Subsequently, gravity-driven sedimentation of liquid metal (LM) in a polydimethylsiloxane (PDMS)/CNT solution is employed to fabricate a Janus-structured PDMS/CNT/LM film. The components are assembled into a sandwich-type sensor integrating multiple sensing mechanisms: piezoresistive/piezocapacitive effect, fringing effect, and triboelectric nanogenerator (TENG). The sensor exhibits considerable pressure sensitivity (0.044 kPa⁻¹), a fast response time of TENG (< 20 ms), and a non-contact sensing range of approximately 20 cm. Dual-mode capacitive–resistive sensing enables seamless detection of approach, touch, and pressure without crosstalk. Moreover, the synergistic between the TENG and the piezoresistive/capacitive responses allows for dynamic and static pressure perception and enables intelligent material identification with over 93 % accuracy when assisted by a Random Forest algorithm. This work highlights the potential of natural forces in the design and fabrication of flexible sensors.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.