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Updated: Apr 19, 2026

Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers

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Refining Fingermark Development using Diacetylene Copolymers on Difficult Surfaces(.).

Natasha Stojanovska¹, Adrian De Grazia, Mark Tahtouh

¹Department of Chemistry and Forensic Science, University of Technology, Sydney, PO Box 123, Broadway, NSW, 2007, Australia.

Journal of Forensic Sciences

|December 25, 2014

Summary

Researchers developed methods to control diacetylene copolymer polymerization for improved fingermark detection. These techniques enhance ridge detail on challenging surfaces like pig skin, aiding forensic investigations.

Keywords:

Raman mapping diacetylenes fingermarks forensic science solid-state polymerization topochemical polymerization

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Area of Science:

Forensic Science
Polymer Chemistry
Materials Science

Background:

Diacetylene copolymers offer potential for fingermark detection.
Controlling polymerization is key for effective fingermark visualization.

Purpose of the Study:

To develop methods for controlling diacetylene polymerization in fingermarks.
To enhance fingermark development on difficult surfaces.
To compare imaging techniques for developed fingermarks.

Main Methods:

Utilized a mixture of 2,4-hexadiyne-1,6-bis-(phenylurethane) (HDDPU) and 2,4-hexadiyne-1,6-bis(p-chlorophenylurethane) (HDDCPU) monomers in acetone.
Employed humidity control, freezing temperatures, and solvent washing to inhibit or enhance polymerization.
Evaluated fingermark development on various surfaces, including pig skin.
Compared conventional lighting and fast Raman mapping with FTIR imaging.

Main Results:

Developed methods successfully controlled diacetylene polymerization for fingermark detection.
Fast Raman mapping proved advantageous over FTIR imaging for developed fingermarks.
Effective fingermark development with clear ridge detail was achieved on pig skin.
Covert detection of fingermarks on difficult surfaces was demonstrated.

Conclusions:

The study provides effective strategies for controlling diacetylene copolymerization in fingermark detection.
These advancements enhance the utility of diacetylene copolymers for forensic applications, especially on challenging substrates.
The developed methods show promise for covert and efficient fingermark visualization.