NaYF_4:Yb,Er上转换发光纳米材料的合成及其在手印显现中的应用  

Synthesis of NaYF_4:Yb,Er Upconversion Luminescent Nanomaterials and their Applications in Development of Latent Fingerprints

作　　者：王猛[1,2] 郭兴家[3] 

机构地区：[1]中国刑事警察学院痕迹检验技术系,辽宁沈阳110035 [2]痕迹检验鉴定技术公安部重点实验室,辽宁沈阳110035 [3]辽宁大学化学院,辽宁沈阳110036

出　　处：《辽宁大学学报（自然科学版）》2015年第2期162-168,共7页Journal of Liaoning University：Natural Sciences Edition

基　　金：国家自然科学基金项目(21205139);辽宁省高等学校优秀人才支持计划(LJQ2014130);公安部应用创新计划项目(2012YYCXXJXY127);公安部科技强警基础工作专项项目(2014GABJC033);东穗科技创新基金项目(2014-7)

摘　　要：采用溶剂热法合成出发光强度较高、颗粒尺寸较小的Na YF4∶Yb,Er上转换发光纳米材料.通过透射电子显微镜(TEM)、X射线衍射(XRD)、荧光光谱对上转换发光纳米材料的粒径形貌、晶体结构、发光性能进行表征.将上转换发光纳米材料应用于光滑客体表面汗潜手印的显现,考察了显现方法的对比度、灵敏度、选择性、背景颜色干扰、背景荧光干扰等因素.实验结果表明:与传统荧光粉末显现法相比,该显现方法具有对比度强、灵敏度高、选择性好、背景干扰低等优点.NaYF4 ： Yb, Er upconversion luminescent nanomaterials （ UCNMs ） with high lum inescent intensity and small size were synthesized via a solvothermal method. The size, phase, and luminescent properties of the UCNMs were characterized by transmission electron microscope （TEM）, X-ray diffraction（ XRD）, and luminescence spectroscopy. The as-prepared UCNMs were successfully used for the development of latent fingerprints on various of smooth substrates, and the developing contrast, sensitivity, selectivity, background color interference, and background fluorescence interference of the method were also studied in detail. The results showed that our method exhibited a higher contrast, higher sensitivity, higher selectivity, and lower background interface in fingerprint development, compared with the traditional powder method.

关 键 词：手印显现 纳米材料 发光材料 潜在手印 上转换 稀土 

分 类 号：O614.33[理学—无机化学] O611.4[理学—化学]