Issue 16, 2024

Electrochromic visualization of latent fingermarks deposited on nonconductive surfaces

Abstract

Electrochromic visualization of latent fingermarks has already been achieved on conducting surfaces such as stainless steel. However, their enhancement on non-conducting surfaces such as glass via electrochromism has not been reported. Considering the non-conductive nature of substrates, a layer of gold was introduced to the fingermark-bearing surfaces, in which gold was used as the cathodes to assemble electrochromic devices for visualization. The contact between gold nanoparticles of the as-obtained conducting layer in the fingermark region should be affected by the height difference within the fingermark, leading to conductivity differences, which give rise to coloration differences in electrochromic devices. It is demonstrated that 1,1′-dibenzyl-4,4′-bipyridinium dichloride can be used as the electrochromic chromophore for the visualization of latent fingermarks deposited on nonconducting surfaces, and the primary and secondary characteristic information can be obtained. The electrochromic visualization herein solves the problem of electrochromically enhancing latent fingermarks on non-conducting surfaces.

Graphical abstract: Electrochromic visualization of latent fingermarks deposited on nonconductive surfaces

Article information

Article type
Paper
Submitted
01 พ.ค. 2567
Accepted
11 มิ.ย. 2567
First published
11 มิ.ย. 2567

Analyst, 2024,149, 4187-4192

Electrochromic visualization of latent fingermarks deposited on nonconductive surfaces

Y. Kong, X. Shi, M. Wang, W. Chen, L. Li, L. Zhang and D. Xiao, Analyst, 2024, 149, 4187 DOI: 10.1039/D4AN00632A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements