Quantitative Evaluation of Influences of Material Properties on Latent Fingerprint Development Effects
10.19756/j.issn.0253-3820.251153
- VernacularTitle:显现材料性质对手印显现效果影响的定量评估
- Author:
Jie LI
1
;
Ming LI
;
Rong-Wei MA
;
Zhi-Ze XU
;
Chuan-Hao FANG
;
Meng WANG
Author Information
1. 中国刑事警察学院刑事科学技术学院,沈阳 110035
- Keywords:
Fingerprint;
Development;
Nanomaterials;
Contrast;
Sensitivity;
Selectivity
- From:
Chinese Journal of Analytical Chemistry
2025;53(8):1279-1289,中插4-中插18
- CountryChina
- Language:Chinese
-
Abstract:
The influence of material properties on fingerprint development effects were systematically studied.Firstly,carbon dots/NaYF4 and Cu nanoclusters/starch nanocomposites respectively possessing different fluorescent intensities and dual fluorescent colors,as well as NaYF4 micro-/nano-materials exhibiting different morphologies,sizes,and surface properties were chemically synthesized and further used for latent fingerprint development.Then,the developing effects were comprehensively evaluated by visual analysis combining with spectral characterization and Python-based calculation.Finally,the influences of material properties on latent fingerprint development were quantitatively evaluated from three dimensions including contrast,sensitivity,and selectivity.The fluorescence properties of developing materials and substrates could significantly affect the developing contrast,namely,the stronger the developing signal,the higher the contrast;the weaker the background noise,the higher the contrast.The sizes and morphologies of the developing materials could respectively influence the quantity and quality of developed minutiae,and significantly affect the developing sensitivity,namely,the smaller the particle size of developing materials,the more the quantity of developed minutiae and the higher the sensitivity;the smaller the surface area of developing materials,the higher the quality of developed minutiae and the higher the sensitivity.The surface properties together with the sizes and morphologies of developing materials could influence their adsorption performances,and significantly affect the developing selectivity,namely,the stronger the specific adsorption of developing materials with fingerprint substance,and the weaker the non-specific adsorption of developing materials with substrate,the higher the selectivity.Moreover,the fingerprint development using the materials with suitable surface area and appropriate mass would have a high selectivity.
