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Issue 1, 2013
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Evaluation of a drop-on-demand micro-dispensing system for development of artificial fingerprints

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Abstract

Precision micro-dispensing is an evolving technique that has many applications in the scientific and additive manufacturing communities. Here we describe a method for dispensing viscous materials, including the oily substance found in human fingerprints, known as sebum. In this work, a dispense jet system was used to deposit known amounts of sebum onto surfaces to represent an artificial human fingerprint. Ultraviolet-visible spectrophotometry (UV-Vis) and microgravimetry were used to verify the sebum mass loadings of the samples. The dispense jet was capable of printing a viscous sebum mixture as well as a less viscous solution of sebum dissolved in heptane. This method was shown to be repeatable, and UV-Vis was found to be a simple and useful technique for verifying the mass of sebum deposited. This method could be used to prepare artificial fingerprint samples for a variety of applications including the preparation of test materials for emerging trace detection technologies.

Graphical abstract: Evaluation of a drop-on-demand micro-dispensing system for development of artificial fingerprints

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Article information


Submitted
09 Oct 2012
Accepted
01 Nov 2012
First published
02 Nov 2012

Anal. Methods, 2013,5, 180-186
Article type
Paper

Evaluation of a drop-on-demand micro-dispensing system for development of artificial fingerprints

J. L. Staymates, M. E. Staymates and G. Gillen, Anal. Methods, 2013, 5, 180
DOI: 10.1039/C2AY26167G

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