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Stimuli-Responsive Materials from Ferrocene-Based Organic Small Molecule for Wearable Sensors

Li, Ling; Zhang, Jianyu; Yang, Chenyi; Huang, Le; Zhang, Jun; Bai, Jie; Redshaw, Carl; Feng, Xing; Cao, Changyong; Huo, Nengjie; Li, Jingbo; Tang, Ben Zhong

Authors

Ling Li

Jianyu Zhang

Chenyi Yang

Le Huang

Jun Zhang

Jie Bai

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry

Xing Feng

Changyong Cao

Nengjie Huo

Jingbo Li

Ben Zhong Tang



Abstract

Stimuli-responsive crystals capable of energy conversion have emerged as promising materials for smart sensors, actuators, wearable devices, and robotics. Here, a novel ferrocene-based organic molecule crystal (Fc-Cz) that possesses anisotropic piezoelectric, optical, and mechanical properties is reported. It is demonstrated that the new crystal Fc-Cz can be used as an ultrasensitive piezoelectric material in fabricating strain sensors. The flexible sensor made of crystal Fc-Cz can detect small strains/deformations and motions with a fast response speed. Analysis based on density functional theory (DFT) indicates that an external pressure can affect the dipole moment by changing the molecular configuration of the asymmetric single crystal Fc-Cz in the crystalline state, leading to a change of polarity, and thereby an enhanced dielectric constant. This work demonstrates a new artificial organic small molecule for high-performance tactile sensors, indicating its great potential for developing low-cost flexible wearable sensors.

Citation

Li, L., Zhang, J., Yang, C., Huang, L., Zhang, J., Bai, J., …Tang, B. Z. (2021). Stimuli-Responsive Materials from Ferrocene-Based Organic Small Molecule for Wearable Sensors. Small, https://doi.org/10.1002/smll.202103125

Journal Article Type Article
Acceptance Date Aug 11, 2021
Online Publication Date Oct 5, 2021
Publication Date Oct 5, 2021
Deposit Date Oct 9, 2021
Publicly Available Date Oct 6, 2022
Journal Small
Print ISSN 1613-6810
Electronic ISSN 1613-6829
Publisher Wiley
Peer Reviewed Peer Reviewed
Article Number 2103125
DOI https://doi.org/10.1002/smll.202103125
Keywords Aggregation-induced emission; Organic small molecules; Piezoelectricity; Polarizability; Wearable devices
Public URL https://hull-repository.worktribe.com/output/3849840