铕掺杂SiO2复合凝胶在手印显现中的应用  

Application of Europium Doped Silica Gel Composite to Fingerprint Detection

作　　者：刘丽[1,2] 翟玉春[1] 郑钧康 

机构地区：[1]东北大学材料冶金学院,沈阳110003 [2]中国刑事警察学院刑技一系,沈阳110035 [3]德州理工大学物理系德克萨斯州美国

出　　处：《应用化学》2009年第4期396-400,共5页Chinese Journal of Applied Chemistry

基　　金：公安部应用创新计划项目(2007YYCXXJXY104)

摘　　要：采用溶胶-凝胶法合成了铕掺杂SiO2复合胶体材料,制备了可用于潜在汗液手印显现的磁性粉末(简称EMO),实验了该粉末显现刑事现场常见的渗透性和非渗透性客体表面潜在手印的效果,考察了手印遗留时间、显出手印荧光稳定性等因素对应用的影响,给出了复合凝胶的紫外可见吸收光谱和荧光光谱,解释了显现手印的基本原理。实验证明,该功能型材料可作为潜在汗液手印的良好显现粉末。Europium（Ⅲ） doped silica gel composite was prepared by the sol-gel method,and the magnetic powder EMO for fingerprint detection was designed.Its application to the development of latent fingerprints left on some porous or nonporous surfaces and likely in crime scene was investigated.The effects of the aging of fingerprints and the stability of the labeled prints were discussed.The UV-Vis and fluorescence characterizations as well as the basic principle to detect fingerprints were presented.The results show that this EMO powder is an excellent development powder for the latent fingerprint detection.

关 键 词：铕 掺杂 手印 显现 

分 类 号：O611[理学—无机化学]