荧光性聚酰胺-胺树形分子在潜指纹显现中的应用研究

本文系统研究了不同条件(树形分子代数、浓度、浸泡时间等)下荧光性聚酰胺-胺树形分子(PAMAM)水溶液作为荧光探针对锡纸、透明胶带等基底上油印潜指纹的显现效果.结果发现PAMAM树形分子可以和指纹残留物进行靶向结合.结合到指纹纹线上的该荧光性纳米材料在暗室中365 nm紫外光的激发下发出明亮的蓝色荧光,指印纹线与基底反差大、指纹易于辨认,且操作简单,试剂完全环保无污染.这些结果表明PAMAM水溶液是一种潜在的优良的指纹显现试剂.最后,把PAMAM树形分子水溶液对指纹的显现效果进行量化处理,乳突纹与基底间的灰度对比度达到90%以上.

Application of Photoluminescent PAMAM Dendrimer in Fingerprint Detection

The application of photoluminescent PAMAM dendrimer as a fluorescent marker in oily-riched fingerprint detection on tinfoil,transparent adhesive tape in different condition(such as generation of dendrimers,concentration,treating time,wave of exciting light,etc) was studied in detail.The results show: the fluorescent material exhibited strong visible blue fluorescence under excitation at 365 nm in the dark,and PAMAM dendrimer was a good marker for fingerprint residue targeting,with weaker background development and better contrast between fingerprints and the substrate,and also it is easy to operate without any pollution,which indicates that it is an effective reagent for latent fingerprints detection on non-porous surfaces.Last,the contrast between fingerprints and the substrate was calculated by computer,which shows that the contrast of fingerprints is over 90% when developed by PAMAM dendrimer solutions.