研究了以铝酸锶为基质，Eu^2＋和Dy^3＋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.
参考文献
| [1] | Schnetz B;Margot P .Technical note: latent fingermarks, colloidal gold and multimetal deposition (MMD). Optimisation of the method.[J].Forensic science international,2001(1):21-28. |
| [2] | Becue A;Champod C;Margot P .Use of gold nanoparticles as molecular intermediates for the detection of fingermarks.[J].Forensic science international,2007(2/3):169-176. |
| [3] | Choi M J;MeBean K E;Wuhrer R et al.Investigation into binding of gold nanoparticles to fingermarks using scanning electron microscopy[J].Journal of Forensic Identification,2006,56(01):24-32. |
| [4] | Wade D C .Development of latent prints with titanium di- oxide(TiO2)[J].Journal of Forensic Identification,2002,52(05):551-559. |
| [5] | I.iu Li;Gill S K;Gao Yanping et al.Exploration of the use of novel SiO2 nanocomposites doped with fluorescent Eua+/sensitizer complex for latent fingerprint detection[J].Forensic Science International,2008,176(2-3):163-172. |
| [6] | Bouldin KK;Menzel ER;Takatsu M;Murdock RH .Diimide-enhanced fingerprint detection with photoluminescent CdS/dendrimer nanocomposites.[J].Journal of forensic sciences,2000(6):1239-1242. |
| [7] | Menzel ER;Savoy SM;Ulvick SJ;Cheng KH;Murdock RH;Sudduth MR .Photoluminescent semiconductor nanocrystals for fingerprint detection.[J].Journal of forensic sciences,2000(3):545-551. |
| [8] | 夏威,付剑飞,冀宏斌,肖志国,雷明凯.新型环保节能发光材料：长余辉发光玻璃[J].新材料产业,2007(01):68-71. |
| [9] | Qiu Jianrong;Miura K;Inouye H et al.Femtosecond laser-induced three-dimensional bright and long-lasting phosphorescence inside calcium aluminosilicate glassed doped with rare earth ions[J].Applied Physics Letters,1998,73(13):1763-1765. |
| [10] | Palilia F C;Levine A K .Fluorescent properties of alka- line earth aluminates of the type MAI2 04 activated by di- valent europium[J].Journal of the Electrochemical Society,1968,115(06):642-648. |
| [11] | Liu L;Zhang Z;Zhang L;Zhai Y .The effectiveness of strong afterglow phosphor powder in the detection of fingermarks.[J].Forensic science international,2009(1/3):45-49. |
| [12] | 袁曦明,许永胜,于江波,王红梅,余启钰.溶胶-凝胶法制备铝酸锶发光材料[J].材料开发与应用,2002(05):26-29. |
| [13] | 李群,赵军武,孙飞龙.长余辉材料Sr_4Al_（14）O_（25）：Eu~（2+）,Nd~（3+）的溶胶凝胶法制备及性能研究[J].功能材料,2009(11):1783-1786. |
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