胶体金的制备及其在手印显现中的应用  

Preparation of Colloidal Gold and Its Application on Development of Fingerprint

作　　者：陈顺昌[1] 杨瑞琴[1] 

机构地区：[1]中国人民公安大学刑事科学技术系,北京100038

出　　处：《材料导报》2009年第24期9-12,共4页Materials Reports

基　　金：十一五科学支撑计划(2007BAK26B08);霍英东教育基金(111092);北京科技新星计划(2006B64);北京市教育委员会共建项目

摘　　要：采用柠檬酸钠-鞣酸还原法制备出胶体金,并用紫外可见分光光谱对胶体金粒径及形态进行了评价,结合Zeta电位分析了胶体金的稳定性,利用多重金属沉积法对玻璃表面新鲜的汗潜、油潜手印进行了显现。结果表明,合成的胶体金粒径为10～35nm,且胶体金颗粒形态均一,稳定性强。多重金属沉积法具有选择性吸附强、背景污染小等特点,其显现效果与粉末法相当,甚至优于粉末法。Colloidal gold is reductively prepared by sodium citrate-tannin, the size and morphology of gold is characterized by UV-visible spectrum, the stability of colloidal gold is evaluated by the zeta potentials. MMD is used for the development of fresh sweat and oil fingerprint on glass. The results show that the colloidal gold particles possess a diameter range of 10-35nm, and demonstrate uniform morphology, good time-dependent stability. MMD has advantages on selectively deposition and less contaminated on background. MMD is equal or better than powder.

关 键 词：胶体金 多重金属沉积法 紫外可见光谱 手印显现 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业] S858.31[农业科学—临床兽医学]