A Magnetically Responsive Polydiacetylene Precursor for Latent Fingerprint Analysis

Title
A Magnetically Responsive Polydiacetylene Precursor for Latent Fingerprint Analysis
Author
이찬우
Keywords
polydiacetylene; conjugated polymer; latent fingerprint; magnetic nanoparticle; fingerprint analysis
Issue Date
2016-03
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v. 8, NO 9, Page. 6245-6251
Abstract
A magnetically responsive diacetylene (DA) powder was developed for the visualization of latent fingerprints. A mixture of the DA and magnetite nanoparticles, applied to a surface containing latent fingermarks, becomes immobilized along the ridge patterns of the fingerprints when a magnetic field is applied. Alignment along the ridge structures is a consequence of favorable hydrophobic interactions occurring between the long alkyl chains in the DAs and the lipid-rich, sebaceous latent fingermarks. UV irradiation of the DA magnetite composite immobilized on the latent fingerprint results in the generation of blue colored PDAs. Heat treatment of the blue-colored image promotes a blue-to-red transition as well as fluorescence turn-on. A combination of the aligned pale brown colored monomeric state, UV irradiation generated blue-colored PDA state, as well as the heat treatment generated red-colored and fluorescent PDA state enables efficient visual imaging of a latent fingerprint, which is deposited on various colored solid surfaces.
URI
http://pubs.acs.org/doi/10.1021/acsami.6b00566http://hdl.handle.net/20.500.11754/35647
ISSN
1944-8244
DOI
10.1021/acsami.6b00566
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > ETC
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