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Updated: Jul 18, 2026

Laser-induced Breakdown Spectroscopy: A New Approach for Nanoparticle's Mapping and Quantification in Organ Tissue
Published on: June 18, 2014
Detection and mapping of latent fingerprints by laser-induced breakdown spectroscopy
M T Taschuk1, Y Y Tsui, R Fedosejevs
1University of Alberta, Electrical and Computer Engineering, Edmonton, AB T6G 2V4, Canada. mtaschuk@ece.ualberta.ca
Abstract:
Detection of latent fingerprints on a Si wafer by laser-induced breakdown spectroscopy (LIBS) is demonstrated using approximately 120 fs pulses at 400 nm with energies of 84 +/- 7 microJ. The presence of a fingerprint ridge is found by observing the Na emission lines from the transferred skin oil. The presence of the thin layer of transferred oil was also found to be sufficient to suppress the LIBS signal from the Si substrate, giving an alternative method of mapping the latent fingerprint using the Si emission. A two-dimensional image of a latent fingerprint can be successfully collected using these techniques.
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