Affiliation:
1. State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information Technology Sun Yat‐Sen University Guangzhou 510006 China
2. Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Key Laboratory of Visible Light Communications of Guangzhou Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes College of Science & Engineering Department of Optoelectronic Engineering Jinan University Guangzhou 510632 China
Abstract
AbstractStretchable strain sensors suffer the trade‐off between sensitivity and linear sensing range. Developing sensors with both high sensitivity and wide linear range remains a formidable challenge. Different from conventional methods that rely on the structure design of sensing nanomaterial or substrate, here a heterogeneous‐surface strategy for silver nanowires (AgNWs) and MXene is proposed to construct a hierarchical microcrack (HMC) strain sensor. The heterogeneous surface with distinct differences in cracks and adhesion strengths divides the sensor into two regions. One region contributes to high sensitivity through penetrating microcracks of the AgNW/MXene composite film during stretching. The other region maintains conductive percolation pathways to provide a wide linear sensing range through network microcracks. As a result, the HMC sensor exhibits ultrahigh sensitivity (gauge factor ≈ 244), broad linear range (ɛ = 60%, R2 ≈ 99.25%), and fast response time (<30 ms). These merits are confirmed in the detection of large and subtle human motions and digital joint movement for Morse coding. The manipulation of cracks on the heterogeneous surface provides a new paradigm for designing high‐performance stretchable strain sensors.
Funder
Fundamental Research Funds for the Central Universities
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
3 articles.
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