刑事技术Issue(1)：15-18,4.DOI:10.16467/j.1008-3650.2015.01.004
新型粉末状荧光502熏显手印荧光波段研究
Selection of Fluorescence Band Using Novel Fluorescent Cyanoacrylate Powder for Latent Fingerprint Visualization
摘要
Abstract
Objective This study aims to select the appropriate exciting light source and filter to visualize latent fingerprints on non-porous surface fumed with the novel fluorescent cyanoacrylate powder. Methods The appropriate light source and filter were selected by means of the fluorescence spectrometer along with both the excitation and emission spectrums decided. Results The analysis of new fluorescent cyanoacrylate powder by fluorescence spectroscopy showed that the excitation wavelength of light source was 235~580nm with the maximum peak at 530nm where the fluorescent intensity was the biggest, and also quite strong absorbance peaks were obtained at 450nm and 360nm, with 45nm Stokes shift. Verification experiments indicated that the effect of developing fingerprints was good in the range of 235~580nm. Conclusions The fingerprints fumed with the new fluorescent cyanoacrylate powder can be visualized under the light of UV, violet, blue, yellow, and green with the merits of large Stokes shift and high fluorescent intensity, easy to eliminate the interference of background fluorescence, and facilitative to select filters. The fingerprints can be visualized clearly with the fluorescence selected by comprehensive consideration of the above factors. Besides the property of fluorescent powder, the effect of developing fingerprint with fluorescence relies on the exciting light source, the filter, and the inherent luminescence characteristics of submitted exhibits and the conditions of exhibit surface.关键词
手印显现/新型粉末状荧光 502/荧光光谱分析Key words
fingerprint development/new fluorescent cyanoacrylate powder/fluorescent spectroscopy分类
社会科学引用本文复制引用
李康,涂霓,李孝君,郝翔,关晨..新型粉末状荧光502熏显手印荧光波段研究[J].刑事技术,2015,(1):15-18,4.基金项目
中央级公益性科研院所基本科研业务费项目（No.2014JB007），浙江警察学校校级科研项目 （）
