Visualization of Latent Fingerprints on Aluminum

Chemical Education

Authors

  • Rachel Fischer Freiburg University of Education, Chemistry Department, Kunzenweg 21, DE-79117 Freiburg
  • Marco Oetken Freiburg University of Education, Chemistry Department, Kunzenweg 21, DE-79117 Freiburg;, Email: marco.oetken@ph-freiburg.de

DOI:

https://doi.org/10.2533/chimia.2019.945

Keywords:

Aluminum, Chemical education, Electrochemical method, Visualization latent fingerprints

Abstract

For aluminum, a new visualization method is presented in which copper is deposited electrochemically. The fingerprint on the aluminum (trace carrier) serves as an insulator as it prevents direct contact between electrolyte and aluminum. The decisive factor is the choice of an ammoniacal copper sulfate solution, which acts as a corrosion inhibitor due to the ammonia molecules. This enables uniform copper deposition on aluminum and thus the development of a clearly defined negative image.

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Published

2019-11-01

How to Cite

[1]
R. Fischer, M. Oetken, Chimia 2019, 73, 945, DOI: 10.2533/chimia.2019.945.