Instantaneous visual imaging of latent fingerprints in water

作     者：Yu Fang 

作者机构：Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2022年第65卷第10期

页      面：1841-1842页

核心收录：

学科分类：030604[法学-侦查学] 03[法学] 0703[理学-化学] 0306[法学-公安学] 

主　　题：visual latent details 

摘      要：Fingerprints are widely acknowledged as crucial evidence for personal identification and security,among which the invisible latent fingerprints(LFPs)is one of the most common and arduous proofs in investigations of crime scenes[1].Conventional imaging techniques suffer from various limitations like low contrast and sensitivity[2],which can only recognize macroscopic features of LFPs,including shape,core,ending,bifurcation,and island(Levels 1 and 2).Alternatively,aggregation-induced emission(AIE)materials[3]have shown great potential in visualizing LFPs with microscopic details,like pores,ridges and their edges(Level 3),due to their strong fluorescence,easy functionalization,and intrinsic AIE characteristics[4].Despite these advances,several issues still hamper the practical application of AIE probes in this field:(1)organic solvents rather than environmentally more benign water are used in most cases with extended incubation time;(2)cheap,general,and colortunable probes for LFPs are still missing[5],which hampered their practical application for different scenarios;(3)in-depth understanding of the plausible mechanism for the visual imaging of LFPs at molecular level is still underdeveloped in most cases.