Molecular Ferroelectric-Based Flexible Sensors Exhibiting Supersensitivity and Multimodal Capability for Detection

Wenru Li, Changhao Li, Guangzu Zhang, Linkai Li, Kai Huang, Xuetian Gong, Chao Zhang, An Zheng, Yanxue Tang, Zhengzhi Wang, Qiaoling Tong, Wen Dong, Shenglin Jiang, Sulin Zhang, Qing Wang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Although excellent dielectric, piezoelectric, and pyroelectric properties matched with or even surpassing those of ferroelectric ceramics have been recently discovered in molecular ferroelectrics, their successful applications in devices are scarce. The fracture proneness of molecular ferroelectrics under mechanical loading precludes their applications as flexible sensors in bulk crystalline form. Here, self-powered flexible mechanical sensors prepared from the facile deposition of molecular ferroelectric [C(NH2)3]ClO4 onto a porous polyurethane (PU) matrix are reported. [C(NH2)3]ClO4-PU is capable of detecting pressure of 3 Pa and strain of 1% that are hardly accessible by the state-of-the-art piezoelectric, triboelectric, and piezoresistive sensors, and presents the ability of sensing multimodal mechanical forces including compression, stretching, bending, shearing, and twisting with high cyclic stability. This scaling analysis corroborated with computational modeling provides detailed insights into the electro-mechanical coupling and establishes rules of engineering design and optimization for the hybrid sponges. Demonstrative applications of the [C(NH2)3]ClO4-PU array suggest potential uses in interactive electronics and robotic systems.

Original languageEnglish (US)
Article number2104107
JournalAdvanced Materials
Volume33
Issue number44
DOIs
StatePublished - Nov 2 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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