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Abstract
This paper introduces a sweat-responsive covalent organic framework (COF) film, COFTPDA-TTFy, for material-based fingerprint liveness detection and sweat pore analysis. The COF film changes color from yellow to red upon exposure to sweat, allowing for naked-eye identification of fingerprints from living fingers. This method achieves 100% accuracy in distinguishing living fingers from fake fingerprints. Additionally, by shortening the contact time, the film can also collect and analyze the distribution of sweat pores on the skin. The film is reusable after washing with ethanol.
Publisher
Nature Communications
Published On
Feb 03, 2023
Authors
Qing Hao, Xiao-Rui Ren, Yichen Chen, Chao Zhao, Jingyi Xu, Dong Wang, Hong Liu
DOI
https://doi.org/10.1038/s41467-023-36291-9
Tags
covalent organic framework
fingerprint detection
liveness detection
sweat analysis
color change
reusable film

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