Columnar-thin-film acquisition of fingerprint topology

Robert C. Shaler, Akhlesh Lakhtakia, Jessica W. Rogers, Drew P. Pulsifer, Raúl J. Martín-Palma

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fingerprint visualization obtained from physical evidence taken from crime scenes for subsequent comparison typically requires the use of physical and chemical techniques. One physical technique to visualize or develop sebaceous fingerprints on various surfaces employs the deposition of metals such as gold and zinc thereon. We have developed a different vacuum technology: the conformal-evaporated-film-by-rotation technique to deposit dense columnar thin films (CTFs) on latent fingerprints on different types of surfaces. Sample fingerprints, acting as nonplanar substrates, deposited on different surfaces were placed in a vacuum chamber with the fingerprint side facing a boat containing an evaporant material such as chalcogenide glass. Thermal evaporation of the solid material led to the formation of a dense CTF on the fingerprint, thereby capturing the topographical texture with high resolution. Our results show that it is possible to acquire the topology of latent fingerprints on non-porous surfaces. Additionally, deposition of CTFs on overlapping fingerprints suggested ours may be a technique for elucidating the sequence of deposition of the fingerprints at the scene.

Original languageEnglish (US)
Title of host publicationNanostructured Thin Films III
Volume7766
DOIs
StatePublished - Oct 28 2010
EventNanostructured Thin Films III - San Diego, CA, United States
Duration: Aug 4 2010Aug 5 2010

Other

OtherNanostructured Thin Films III
CountryUnited States
CitySan Diego, CA
Period8/4/108/5/10

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Shaler, R. C., Lakhtakia, A., Rogers, J. W., Pulsifer, D. P., & Martín-Palma, R. J. (2010). Columnar-thin-film acquisition of fingerprint topology. In Nanostructured Thin Films III (Vol. 7766). [776607] https://doi.org/10.1117/12.859708