稀土荧光粉Zn_2SiO_4:Mn^(2+),Er^(3+)的性能优化及显现潜在指纹的研究

Performance Optimization of Rare Earth Phosphor Zn_2SiO_4: Mn^(2+),Er^(3+) and Application in Manifesting Latent Fingerprints

指纹显现技术是痕迹学乃至物证技术学领域研究的重点内容之一,现行的指纹显现试剂和显现方法仍存在一定的隐患。以稀土荧光粉Zn2Si O4:Mn2+,Er3+为研究对象,借助纳米稀土发光材料在生物荧光检测领域的应用思路,通过表面修饰技术、湿法球磨等方法对荧光粉的发光性能、吸附能力和粒径形貌等指标进行优化与控制,使之成功地应用于潜在指纹显现中,能够显现遗留在不同客体上不同遗留时间的潜在指纹;建立了一种高效、无毒、无损、便利的潜在指纹显现技术新方法,并拓展了稀土荧光粉的应用范围。

Fingerprint recognition technology is one of the most important ichnology and even material evidence technology. However,there are still hidden troubles in fingerprint in forensic identification. The study was based on the rare earth phosphor Zn2 Si O4： Mn2 ＋,Er3 ＋with the application of rare earth nanomaterials in biological fluorescence detection. The absorbability,the morphology,and the size of the Zn2 Si O4： Mn2 ＋,Er3 ＋were controlled and improved through surface modification technology,wet milling,etc. The phosphor was successfully used in manifesting the latent fingerprints and can display the latent fingerprints in different objects with different time. An efficient,nontoxic,convenient,harmlessness and pollution method of fingerprint recognition technology was established. This technique widens the range of application of rare earth phosphor.