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Refining Fingermark Development using Diacetylene Copolymers on Difficult Surfaces ,
Author(s) -
Stojanovska Natasha,
De Grazia Adrian,
Tahtouh Mark,
Shimmon Ronald,
Reedy Brian
Publication year - 2015
Publication title -
journal of forensic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.715
H-Index - 96
eISSN - 1556-4029
pISSN - 0022-1198
DOI - 10.1111/1556-4029.12692
Subject(s) - diacetylene , materials science , polymerization , copolymer , monomer , solvent , acetone , chemical engineering , nanotechnology , polymer , organic chemistry , chemistry , composite material , engineering
In further work investigating the intriguing application of diacetylene copolymers in fingermark detection, methods were developed to control (inhibit or enhance) the diacetylene polymerization reaction in fingermarks treated with a mixture of the monomers 2,4‐hexadiyne‐1,6‐bis‐(phenylurethane) ( HDDPU ) and 2,4‐hexadiyne‐1,6‐bis( p ‐chlorophenylurethane) ( HDDCPU ) in acetone solution. These methods included the use of a humidity chamber to reduce the amount of background development while promoting development on the fingermark, subjecting developed fingermarks to freezing temperatures and using a solvent to remove unreacted monomer in order to inhibit the polymerization reaction. Developed fingermarks were enhanced by conventional lighting (white light, filtered light) and fast Raman mapping, which was shown to be advantageous over FTIR imaging. This study also demonstrated the applicability of diacetylene copolymer solutions in the covert detection of fingermarks on difficult surfaces. Furthermore, fingermarks were successfully developed with good ridge detail on pig skin (used as a model for human skin, a notoriously difficult surface on which to develop fingermarks).