A Magnetically Responsive Polydiacetylene Precursor for Latent Fingerprint Analysis
- Authors
- Lee, Joosub; Lee, Chan Woo; Kim, Jong-Man
- Issue Date
- Mar-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- polydiacetylene; conjugated polymer; latent fingerprint; magnetic nanoparticle; fingerprint analysis
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.8, no.9, pp.6245 - 6251
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 8
- Number
- 9
- Start Page
- 6245
- End Page
- 6251
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/155037
- DOI
- 10.1021/acsami.6b00566
- ISSN
- 1944-8244
- 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.
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