title: Visualization of Sweat Fingerprints on Various Surfaces Using a Conjugated Polyelectrolyte.
abstract: A conformation-variable conjugated polyelectrolyte responding to oppositely charged biomolecules was examined as an imaging agent for the detection of latent fingerprints (LFPs). Sulfonated poly(diphenylacetylene) (SPDPA) produces high-resolution fluorescence (FL) LFP images by simple wetting of the target objects with the polymer solution without any additional treatment. SPDPA readily interacts with LFP sweat components (especially amino acids) via electrostatic interactions, leading to significantly enhanced FL images in a "turn-on" mode. The FL emission enhancement was examined in a model reaction between SPDPA and an amino acid standard. Visualization with SPDPA is effective on various surfaces, including both rough (paper) and smooth (glass and plastic) ones. Moreover, SPDPA readily interacts with extremely thin sweat LFPs, especially on smooth glass surfaces.
authors: School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University , 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.
authors: Joon-Hyun
authors: JH
authors: Yoon
authors: School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University , 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.
authors: Young-Jae
authors: YJ
authors: Jin
authors: Department of Materials Science and Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan.
authors: Toshikazu
authors: T
authors: Sakaguchi
authors: School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University , 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.
authors: Giseop
authors: G
authors: Kwak
keywords: conjugated polyelectrolyte; imaging probe; latent fingerprint; sweat; visualization