Skip to main content

Visualization of Latent Fingerprint Corrosion of Brass

The full text article is not available.

At present, only title information is available on ingentaconnect.com for this article. This is due to copyright restrictions.

Abstract:

Abstract: 

Visualization of latent fingerprint deposits on metals by enhancing the fingerprint-induced corrosion is now an established technique. However, the corrosion mechanism itself is less well understood. Here, we describe the apparatus constructed to measure the spatial variation (ΔV) in applied potential (V) over the surface of brass disks corroded by latent fingerprint deposits. Measurement of ΔV for potential of 1400 V has enabled visualization of fingerprint ridges and characteristics in terms of this potential difference with ΔV typically of a few volts. This visualization is consistent with the formation of a Schottky barrier at the brass-corrosion product junction. Measurement of the work function of the corroded brass of up to 4.87 ± 0.03 eV supports previous results that suggested that the corrosion product is composed of p-type copper oxides. A model for the galvanic corrosion of brass by ionic salts present in fingerprint deposits is proposed that is consistent with these experimental results.

Keywords: electrochemical mechanism; forensic science; latent fingerprint; latent fingerprint components; metal surface; print visualization

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1556-4029.2009.01108.x

Publication date: 2009-09-01

  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more