SrAl2O4：Eu^2＋，Dy^3＋时间分辨手印成像研究  

Research on time-resolved imaging of fingerprint developed by SrAl_2O_4:Eu^(2+),Dy^(3+)

作　　者：熊晓波[1,2] 袁曦明[1] 尹国祥[2] 张剑[2] 段冶[2] 

机构地区：[1]中国地质大学纳米矿物材料及应用教育部工程研究中心,湖北武汉430074 [2]湖北警官学院法庭科学湖北省重点实验室,湖北武汉430034

出　　处：《功能材料》2012年第20期2843-2847,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21171152);公安部应用创新计划资助项目(2009YYCXHBST060)

摘　　要：研究了以铝酸锶为基质,Eu2+和Dy3+共掺杂的长余辉粉体(SED)光学性质,将长余辉粉体与铁粉混合,用于刷显不同客体上的潜在手印,采集了手印发光图像,与普通荧光粉进行了手印显现、成像对比研究。实验结果表明,长余辉粉体适用于非渗透性和半渗透性客体上的手印显现,其超长余辉性质,可以消除(降低)背景干扰,有助于实现背景图案复杂客体上的手印时间分辨成像。Conventional development of latent fingerprints is compromised when the prints are on the difficult and patterned substrates. In consideration of this problem, Eu^2＋ , Dy^3＋ co doped SrAl2O4 （SED） was synthe- sized by sol-gel method. It was characterized by X-ray diffraction （XRD）, and photoluminescence （PL） spec- trometer respectively. Owing to super long afterglow properties of SED, it was introduced to development of fingerprints on non-porous and semi-porous substrates, and image of fingerprints. Compared with common flu- orescent powders, SED powder was more applicable for latent fingerprint detections on various substrates, in- cluding glass, ceramic tile, plastic, smooth hard paper, print paper, and leather. It was quite significant that background disturbance of difficult and patterned substrates was effectively eliminated or diminished, and time resolved imaging was achieved using SED powder for fingerprint detection.

关 键 词：长余辉粉体 掺杂 手印显现 背景干扰 时间分辨成像 

分 类 号：O644[理学—物理化学] D920.5[理学—化学]