DataVXAdvanced Functional MaterialsPaper
journal article·2024-04

A Magnet‐Driven Soft Bistable Actuator

Zhou Chen, Shangcheng Kong, Yunhu He, Shiting Chen, Wanying Wang, Lihan Jin, Shun Zhang, Ying Hong, Lulu Pan, Haikun Wu, Youneng Xie, Changhong Linghu, Zhengyi Mao, Zhengbao Yang, Chi Hou Chan, Jizhou Song, Jian Lu

Advanced Functional Materials· Volume 34· Issue 17
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Source abstract

Abstract

Abstract Bistable morphing structures are widely used as actuation mechanisms in soft actuators, soft robotics, energy absorbers, mechanical computers, optical lenses, metamaterials, and flexible electronics. However, untethered actuators, repetitive actuators, and hybrid‐assembly (containing in‐plane‐assembly and out‐of‐plane‐assembly) actuators remain challenging to realize using existing bistable structures, which hinders the novel application of such actuators in research, engineering, and daily life. This problem is solved by fabricating a magnet‐driven soft bistable actuator (MSBA) unit. The self‐buckling of the circular polydimethylsiloxane (PDMS) sheet ensures the bistability of the actuator and allows it to operate as an independent unit, free of external constraints. The reorientation of neodymium‐iron‐boron (NdFeB) microparticles embedded in the PDMS sheet enables the dome‐shaped actuators to exhibit repetitive snapping under the stimulus of a direction‐switching magnetic field. The potential of this MSBA unit in bionics, electronics, and biomechanics applications is demonstrated in systematic studies involving modification of the buckling deflection and magnetic moment density. The MSBA unit exhibits excellent performance in hybrid designs and intelligent systems.
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Research context

OpenAlex topics: Advanced Materials and Mechanics · Advanced Sensor and Energy Harvesting Materials · Micro and Nano Robotics

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

Affiliations

Centre for Advanced Structural Materials Greater Bay Joint Division Shenyang National Laboratory for Materials Science City University of Hong Kong Shenzhen Research Institute Shenzhen 518057 China

Hong Kong Branch of National Precious Metals Material Engineering Research Centre City University of Hong Kong Hong Kong 999077 China

Laboratory of Nanomaterials & Nanomechanics City University of Hong Kong Hong Kong 999077 China

Department of Mechanical Engineering City University of Hong Kong Hong Kong 999077 China

CityU–Shenzhen Futian Research Institute Shenzhen 518017 China

State Key Laboratory of Terahertz and Millimeter Waves Department of Electrical Engineering City University of Hong Kong Hong Kong 999077 China

Department of Biomedical Sciences City University of Hong Kong Hong Kong 999077 China

Department of Engineering Mechanics Soft Matter Research Center, and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Zhejiang University Hangzhou 310027 China

Department of Chemistry City University of Hong Kong Hong Kong 999077 China

Funding

National Natural Science Foundation of China · University Grants Committee

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