A sweat-responsive covalent organic framework film for material-based liveness detection and sweat pore analysis

Qing Hao (), Xiao-Rui Ren, Yichen Chen, Chao Zhao, Jingyi Xu, Dong Wang () and Hong Liu ()
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Qing Hao: Southeast University, 2# Sipailou
Xiao-Rui Ren: Chinese Academy of Sciences
Yichen Chen: Southeast University, 2# Sipailou
Chao Zhao: Southeast University, 2# Sipailou
Jingyi Xu: Southeast University, 2# Sipailou
Dong Wang: Chinese Academy of Sciences
Hong Liu: Southeast University, 2# Sipailou

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Covalent organic frameworks have shown considerable application potential and exceptional properties in the construction of stimulus-responsive materials. Here, we designed a sweat-responsive covalent organic framework film for material-based fingerprint liveness detection. When exposed to human sweat, the COFTPDA-TFPy film can transform from yellow to red. The COFTPDA-TFPy film, when touched by living fingers, can produce the naked-eye-identified fingerprint pattern through the sweat-induced color change, while artificial fake fingerprints cannot. This technique, which we named material-based liveness detection, can thus intuitively discern living fingers from fake fingerprints with a 100% accuracy rate. Additionally, the distribution of sweat pores on human skin can also be collected and analyzed by shortening the contact time. By merely washing them with ethanol, all the samples can be utilized again. This work inventively accomplished material-based liveness detection and naked-eye-identified sweat pore analysis and highlighted their potential for use in clinical research and personal identification.

Date: 2023
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DOI: 10.1038/s41467-023-36291-9

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