Topological Nanofibers Enhanced Piezoelectric Membranes for Soft Bioelectronics. (30th September 2022)

• Record Type: Journal Article
• Authors: Lan, Boling; Xiao, Xiao; Carlo, Aiden Di; Deng, Weili; Yang, Tao; Jin, Long; Tian, Guo; Ao, Yong; Yang, Weiqing; Chen, Jun
• Is Part Of: Advanced functional materials. Volume 32:Number 49(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-30
• Subjects: mechanical waves -- piezoelectric membranes -- soft bioelectronics -- textile sensors -- topological designs; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202207393
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Electrospun piezoelectric membranes are compelling building blocks for constructing wearable bioelectronics. However, the efficiency of electromechanical conversion over a wide bandwidth is still insufficient due to the restriction between fiber dipole alignment and energy absorption. Topology optimization is a mathematical method that lets us optimize the layout of a system to maximize its performance given a set of boundary conditions and constraints. Here, topological designs as a reinforcement mechanism are developed to enhance the electromechanical response of electrospun piezoelectric membranes. The topologically optimized membranes show a 300% increase in electric output and a 478% increase in frequency response range compared with traditional electrospun membranes. With the optimized piezoelectric membrane design, the developed textile acoustic sensors can capture the human voice for speech recognition with a classification accuracy of up to 100% with the help of deep learning. Because of the universality and superiority of this new topologically optimal design, it represents a milestone in designing electrospun membranes for electromechanical conversion and high‐performance soft bioelectronics. Abstract : This study reports a topological design to enhance the electromechanical response of electrospun piezoelectric membranes. With the optimized piezoelectric membrane design, the topological structure realizes the high‐fidelity recording and the human–machine interaction applications, which demonstrated a feasible method for constructing high‐performance electrospun piezoelectric membranes for soft bioelectronics.