基于聚集诱导发光技术的潜在指印显现  

Latent Fingerprint Display Based on Aggregation-Induced Emission Technique

作　　者：梁帅 高树辉 郭凌杰[2] Liang Shuai;Gao Shuhui;Guo lingjie(Beijing Key Laboratory of Forensic Science,People’s Public Security University of China,Beijing 100038,China;School of Investigation,People’s Public Security University of China,Beijing 100038,China;Zhengzhou Police University,Zhengzhou 450000,Henan,China)

机构地区：[1]中国人民公安大学刑事科学技术北京市重点实验室,北京100038 [2]中国人民公安大学侦查学院,北京100038 [3]郑州警察学院,河南郑州450000

出　　处：《激光与光电子学进展》2024年第15期376-384,共9页Laser & Optoelectronics Progress

基　　金：刑事科学技术北京市重点实验室建设项目(2023ZB06)。

摘　　要：指印触物留痕,终生基本不变,具有个体识别的证据价值,然而现场指印的提取受诸多因素影响,如客体适应性较差、紫外光学损伤、粗糙客体表面限制、试剂显现后处理复杂、三级特征显现不明显等问题,因此现场指印的显现和提取一直是刑事技术领域研究的重要课题。提出一种基于聚集诱导发光(AIE)技术的潜在指印显现方法,合成蓝光激发、黄光发射的AIE聚合物,采用有机溶剂微网雾化技术,获得高质量的指印图像。结果显示:AIE聚合物具有较高的稳定性,便于长时间保存;显现结果可以清晰观察到指印纹线二级、三级细节特征;对现场常见的各种非渗透性、渗透性客体具有普适性;对于部分疑难客体也有较好的显现效果,且具有十分高效的指印原位提取能力。AIE雾化喷显可以作为常见客体,甚至是疑难客体上潜在指印的显出技术,可靶向定位潜在指印,原位进行接触性脱落细胞提取等,为现场勘查中指印显现和接触DNA物证的发现提供了技术支持。Fingerprint marks on objects remain unchanged throughout their lifetime and have evidential value for individual recognition.However,many factors influence the extraction of on-site fingerprints,including poor object adaptability,ultraviolet optical damage,rough object surface limitations,complex post-processing of reagent display,and unclear tertiary feature display.Therefore,the display and extraction of on-site fingerprints have always been important research topics in the field of criminal technology.In this study,a potential fingerprint display method based on aggregation-induced emission(AIE)technology is proposed.AIE polymers excited by blue light and emitting yellow light were synthesized,and organic solvent microgrid atomization technology was used to obtain high-quality fingerprint images.Results show that AIE polymers exhibit high stability and can be stored easily for a long time.The secondary and tertiary detailed features of fingerprint marks can be clearly observed from the display results.There is also universality among various common nonpermeable and permeable objects on site.For some difficult objects,it has good visualization effects and exhibits highly efficient in situ fingerprint extraction ability.AIE nebulization can be used for displaying potential fingerprint marks on common or even difficult objects.It can target and locate potential fingerprints,extract contact exfoliated cells in situ,and provide technical support for fingerprint display and the discovery of contact DNA evidence during on-site investigations.

关 键 词：聚集诱导发光 潜在指印 疑难客体 微网雾化喷显 

分 类 号：O436[机械工程—光学工程]