期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 42, 页码 37501-37508出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b13390
关键词
polyelectrolyte; latent fingerprints; AIEE; third-level details; abrasion test
资金
- Department of Information Technology, DeitY Project [5(9)/2012-NANO]
- Department of Science and Technology (DST), India [DST/TSG/PT/2009/23, DST/SERB/EMR/2014/000034]
- DST-Max Planck Society, Germany [IGSTC/MPG/PG(PKI)/2011A/48]
The development of highly efficient latent fingerprint (LFP) technology remains extremely vital for forensic and criminal investigations. In this contribution, a straightforward, rapid, and cost-effective method has been established for the quick development of well-preserved latent fingerprint on multiple substrates, including plastic, glass, aluminum foil, metallic surfaces, and so forth, without any additional treatment, based on aggregation-induced enhanced emission-active conjugated polyelectrolyte (CPE) 3,3'4(244(1,2-dipheny1-2-(p-toly1) vinyl)phenyl)-7- (7-methylbenzo [c][ 1,2,S]thiadiaz ol-4-y1)-9H-fluor ene-9,9- diy1)bis (hexane-6,1diMbis(1-methy1-1H-imidazol-3-ium) bromide, revealing clearly the third-level details (ridges, bifurcations, and pores) with high selectivity, high contrast, and no background interference even by blood stains, confirming the ability of the proposed technique for LFP detection with high resolution. The LFP development process was accomplished simply by immersing fingerprint-loaded substrate into the CPE solution for similar to 1 min, followed by shaking off the residual polymer solution and then air drying. The CPE was readily transferred to the LFPs because of the strong electrostatic and hydrophobic interaction between the CPE molecules and the fingerprint components revealing distinct fluorescent images on various smooth nonporous surfaces.
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