上转换发光微粒悬浮液显现手印技术初探

目的 建立NaYF4∶Er,Yb微粒悬浮液显现手印技术方法并界定适用范围与条件.方法 用NaYF4∶Er,Yb微粒悬浮液显现瓷砖、玻璃等19种（各50枚）不同客体上皮脂汗手印,并对结果进行分析比较.结果 该方法对背景复杂的非渗透性客体上的油汗手印显现良好,其效果优于普通ZnO小颗粒悬浮液.结论 该方法操作简便、适用客体广泛、背景干扰少,适合进一步研究推广.

Development of latent fingerprints using NaYF4∶ Er,Yb luminescent up-converter particles

Objective To introduce a new method for latent fingerprints developing by using NaYF4： Er, Yb phosphor suspension, and explore its applicable scope and conditions. Methods The sebaceous fingerprints on non-porous surfaces, including plastic, tile, glass, metal et al. were developed with NaYF4：Er,Yb phosphor suspension. Results The sebaceous fingerprints on non-porous objects with complex background were developed successfully. The effectiveness of NaYF4： Er, Yb was compared with that of traditional Zinc Oxide powder, the results indicated that some benefit of NaYF4：Er, Yb over Zinc Oxide powder for the development of latent fingerprints. Conclusions NaYF4：Er, Yb phosphor suspension is a simple and effective method for fingerprints detection, and has the great potential for development of latent fingerprints.