ZnO荧光纳米粒子在显现潜指纹的应用研究  

Application Research of ZnO Fluorescent Nanoparticles in Latent Fingerprints Detection

作　　者：翟佳丽 ZHAI Jiali(Department of Criminal Science and Technology,Jilin Police College,Changchun 130102,China)

机构地区：[1]吉林警察学院刑事科学技术系,吉林长春130102

出　　处：《化工技术与开发》2024年第8期19-22,共4页Technology & Development of Chemical Industry

基　　金：吉林警察学院重点科研项目(jykyzd202409)。

摘　　要：为了寻找制备方法简单、成本低廉、环境友好且无毒性的具有应用前景的新型非金属潜指纹显现材料,本文以醋酸锌[Zn(AC)_(2)·2H_(2)O]、氢氧化钾(KOH)为原料,采用溶剂热法合成了ZnO纳米粒子,利用X射线衍射仪(XRD)、透射电子显微镜(TEM)和荧光光谱对合成的粉体进行了表征,之后采用常规刷显的方法,对不同客体上的潜指纹进行显现。采用本方法制备得到了粒径约为8nm的ZnO纳米粒子,在254nm的紫外光照射下,ZnO纳米粒子呈现出明亮的黄绿色。该材料对指纹纹线具有较强的吸附特性,能够对锡纸、不锈钢片、玻璃、绿色塑料片、易拉罐、木质地板等非渗透性和渗透性客体表面的潜指纹进行显现,均可得到具有清晰二级特征的指纹图像。In order to search for new non-metallic latent fingerprint display materials,ZnO nanoparticles was synthesized with zinc acetate[Zn(AC)_(2)∙2H_(2)O],potassium hydroxide(KOH)and tetraethyl silicate(TEOS)by solvothermal method.The synthesized powder was characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM)and fluorescence spectrum(FL).Finally,the latent fingerprints on different surface were developed by conventional brush development method.The results showed that ZnO nanoparticles had excelent luminescence properties and appeared bright yellow-green under 254nm ultraviolet light irradiation.The material had strong adsorption characteristics for fingerprint lines,and could display latent fingerprints on the surface of non-permeable and permeable surface such as tinfoil,stainless steel sheets,glass,green plastic card,drink can and wooden floors.The enhancement latent fingerprint had excellent secondary characteristics of fingerprint.

关 键 词：ZnO@SiO_(2) 陈旧指纹 潜指纹显现 

分 类 号：TB383[一般工业技术—材料科学与工程] D918.91[政治法律—法学]