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Preparation of Carbon Quantum Dot Composite Powder and Its Application in Latent Fingerprint Development

Author(s)

Zhouzhou Luo1,2, Shuang Wang2, Boheng Song1, Guangliang Qin1, Zhuo Wang1, Baohua Tang1,*

Affiliation(s)

1China People’s Police University, Langfang, China 2Tianmen Public Security Bureau, Tianmen, China *Corresponding Author

Abstract

Carbon dots (CDs) have unique interfacial modification properties and photophysical performance, offering a new approach for studying latent fingerprint development mechanisms. This paper details the preparation of nitrogen-doped blue carbon quantum dots (N-CQDs) from glucose. N-CQDs were loaded onto three typical porous matrices: lamellar silicate (Na-MMT), microporous zeolite (PMT), and fibrous silicate (APT), to form eco - friendly composite systems with stable photoluminescence for fingerprint development. The study also investigated the effectiveness of these systems on long - standing fingerprints. This work provides new technical routes for fingerprint development and extraction on various substrates, holding practical significance for enhancing the standardization of forensic evidence examination.

Keywords

Latent Fingerprint Development Technology; Carbon Quantum Dots

References

[1]Technology - Information Technology; Researchers from International University of La Rioja Report Findings in Information Technology (Fingerprint Image Enhancement and Reconstruction Using the Orientation and Phase Reconstruction). Computers, Networks & Communications, 2020. [2]Li Yang, Liu Songtao, Sun Junli, et al. Research Progress on Recovery Methods of Bloodstains and Blood Fingerprints at Fire Scene. Forensic Science and Technology, 2024, 49(03): 297-303. [3]Ding Yuan, Liu Li, Hu Yuyan. Systematic Studies on the Appearance of Fingerprint with Amido Black 10B. Chemical World, 2024, 65(01): 55-59. [4]Wang Xianxian. Application of Multi-Band Light Sources in the Discovery of Biological Evidence. Gansu University of Political Science and Law, 2023. [5]Huang Jinliang, Chai Xinle, Ma Rongliang. Exploration of Latent Fingerprint Development in Glove Impressions. Forensic Science and Technology, 2024, 49(03): 237-246. [6]Guo Lingjie, Gao Shuhui. Impact of Aggregation-Induced Emission on Latent Fingerprint Revelation Based on Surface Energy Differences. Laser & Optoelectronics Progress, 2024, 61(15): 378-385. [7]Huang Wei, Zhang Mingxing, Chen Junjie. Optimization of Silver Nitrate-Indole Complex Solution Method for Revealing Sweat Latent Handprints on Paper Surfaces. Journal of the China Criminal Police College, 2024, (01): 105-110. [8]Song Y, Li W. Potential applications of POSS-based fluorescent materials in fingerprint developments. Functional Materials Letters, 2025, 18(04). DOI:10.1142/S1793604725500171. [9]Liu M, Liu A, Shi Y, et al. A multi-task minutiae transformer network for fingerprint recognition of young children. Expert Systems With Applications, 2025, 273126825-126825. Askarin M M, Wang M, Yin X, et al. U-Net-Based Fingerprint Enhancement for 3D Fingerprint Recognition. Sensors, 2025, 25(5):1384-1384.