Abstract:

Objective To establish a method for developing latent fingerprints on wet surfaces. Methods CdSe mercapto acetic acid was used to develop latent fingerprint on wet and nonporous surfaces such as yellow sealing tape， black plastic bag， glass and so forth. The impact factors in developing fingerprints on these objects were discussed and the effects between the traditional method and CdSe materials were comparied. Results Carboxyl encapsulated nano materials enhanced the reaction activity between CdSe and fingerprint residues. So clear and high resolution fingerprint images could be got easily. Conclusion Latent fingerprints on wet and nonporous surfaces could be developed by CdSe mercaptoacetic acid.

Key words: nano CdSe solution, wet and nonporous object, latent fingerprint, development

摘要：

目的 研究水浸客体表面潜指纹的显现方法；方法 利用CdSe巯基乙酸溶液显现被水浸泡过的黄色封箱胶带、黑色塑料袋、玻璃等常见非渗透性客体上的潜手印，讨论影响水浸非渗透性客体上潜手印显现效果的各种因素，并与传统方法进行比较，初步探讨了CdSe巯基乙酸溶液显现水浸非渗透性客体表面潜手印的方法；结果 使用巯基乙酸包覆CdSe纳米复合材料显现潜在手印，使每分子纳米复合材料外表包覆足够数量的羧基，则可以提高它同手印残留物的结合能力，从而得到更高清晰度、更高分辨率的手印显像；结论 巯基乙酸包覆CdSe纳米复合材料可以很好的显现水浸塑料、胶带等表面潜指纹。

关键词: 纳米CdSe, 水浸非渗透性客体, 潜手印, 显现