Enhanced Development of Sweat Latent Fingerprints Based on Ag-Loaded CMCS/PVA Composite Hydrogel Film by Electron Beam Radiation

Jinyu Yang; Yayang Wang; Yuan Zhao; Dongliang Liu; Lu Rao; Zhijun Wang; Lili Fu; Yifan Wang; Xiaojie Yang; Yuesheng Li; Yi Liu

doi:10.3390/gels8070446

Enhanced Development of Sweat Latent Fingerprints Based on Ag-Loaded CMCS/PVA Composite Hydrogel Film by Electron Beam Radiation

Gels. 2022 Jul 18;8(7):446. doi: 10.3390/gels8070446.

Authors

Jinyu Yang^{1

2}, Yayang Wang^{1

2}, Yuan Zhao^{1

2}, Dongliang Liu², Lu Rao², Zhijun Wang², Lili Fu², Yifan Wang², Xiaojie Yang², Yuesheng Li², Yi Liu^{1

3}

Affiliations

¹ Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
² Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-Power Nuclear Technology Collaborative Innovation Center, Hubei University of Science and Technology, Xianning 437100, China.
³ College of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300387, China.

Abstract

Over time, difficulties have been encountered in detecting potential fingerprints. In this study, an Ag/CMCS/PVA(ACP) hydrogel film was developed for fingerprint development by electron beam radiation method. The chemical bond, thermostability, chemical components, microstructure, and micromorphology of the CMCS/PVA composite hydrogel film were characterized by FT-IR, TG, XRD, and SEM, respectively. Swelling behaviors and mechanical performance of the CMCS/PVA composite hydrogel were also investigated at different irradiation doses, pH, media, and NaCl contents to obtain the optimum preparation conditions. Through experimental exploration, we found that the fingerprints appeared more obvious when the irradiated prepared ACP hydrogel film was sprayed with 0.6 mg/mL of Ag⁺ and the excitation wavelength was about 254 nm with UV lamp irradiation for 20 min. The cytotoxicity the CMCS/PVA composite hydrogel on mouse skin fibroblasts L929 cells was also studied, confirming its biological security. Sweat latent fingerprint manifestation has important scientific significance with respect to the development of new processes and functional materials in the field of fingerprint manifestation, enriching and complementing the application of composite hydrogels.

Keywords: Ag-loaded CMCS/PVA hydrogel film; cytotoxicity; development; electron beam radiation; sweat latent fingerprints.

Grants and funding

This work was supported by the National Natural Science Foundation of China (No. 11405050), Hubei Provincial Colleges and Universities Outstanding Young and Middle-aged Technological Innovation Team Project (No. T2020022), Xianning City Key Program of Science & Technology (No. 2021GXYF021), and the Science Development Foundation of Hubei University of Science & Technology (Nos. 2020TD01, 2021ZX01, S201910927021, 2022FH09).