Coral-inspired capacitive pressure sensor with high sensitivity and wide range for human computer

Impact Factor:4.3

DOI number:10.1021/acsaelm.4c01140

Affiliation of Author(s):Southwest Jiaotong University

Teaching and Research Group:Institute of Smart City and IntelligentTransportat

Journal:ACS Applied Electronic Materials

Key Words:capacitive pressure sensor，high sensitivity，3D printing，Y-shaped coral structure，excellent stability

Abstract:Flexible capacitive pressure sensors have extensive applications in healthcare and human-computer interaction. However, current sensors face challenges in sensitivity, response range, and batch-to-batch consistency. Herein, inspired by coral, a capacitive pressure sensor featuring a Y-shaped dielectric layer is developed, offering high sensitivity and a wide detection range. The innovative biomimetic ″Y-shaped coral″ gradient tilt structure skillfully combines two effects: the change in contact area and the reduction in plate spacing, in response to pressure changes. This design not only expands the compressible range of the sensor but also achieves a good balance between high sensitivity and a wide response range. Experimental results show that the fabricated sensor exhibits high sensitivity (1.10 kPa–1), a substantial response range (210 kPa), minimal hysteresis (≈3%), and excellent durability (withstanding over 20,000 cycles at 100 kPa). This sensor has broad application prospects in human-computer interaction, intelligent devices, flexible sensing arrays, and meteorological monitoring, enabling precise identification, real-time monitoring, and efficient support functions. Therefore, we believe that this study not only provides a design approach for capacitive pressure sensors but also offers strong support for technological advancement and application innovation in related fields.

Co-author:Junxiang Jiang,Hongbo Wang,Linmao Qian,Bingjun Yu

First Author:Ranxu Jing,Ranxu Jing

Indexed by:The basic research

Correspondence Author:Zhi-Jun Zhao

Discipline:Engineering

Document Type:J

Volume:6

Issue:9

Page Number:6726–6737

Translation or Not:no

Date of Publication:2024-08-31

Included Journals:SCI、EI

Links to published journals:https://pubs.acs.org/doi/abs/10.1021/acsaelm.4c01140