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NCJRS Abstract

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NCJ Number: 230163 Find in a Library
Title: Latent Print Detection by MacroRaman Imaging
Author(s): R. M. Connatser; Giorgia DePaoli; Charles Gardner; Linda Lewis
Date Published: 2010
Page Count: 34
Sponsoring Agency: National Institute of Justice (NIJ)
Washington, DC 20531
National Institute of Justice/NCJRS
Rockville, MD 20849
NCJRS Photocopy Services
Rockville, MD 20849-6000
Grant Number: 2005-DD-R-094
Sale Source: National Institute of Justice/NCJRS
Box 6000
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Report (Study/Research)
Format: Document
Language: English
Country: United States of America
Annotation: The purpose of this work was to exploit enhanced vibrational spectroscopy to detect latent fingerprints.
Abstract: Exposure to light or heat, or simply a dearth of fingerprint material, renders some latent fingerprints undetectable using conventional methods. The authors address detecting such elusive fingerprints using detection targeting photo and thermally stable fingerprint constituents: Surface Enhanced Raman Spectroscopy (SERS). SERS can give descriptive vibrational spectra of amino acids, among other robust fingerprint constituents, and good sensitivity can be attained by improving metal-dielectric nanoparticle substrates. To the author’s knowledge, this represents the first SERS imaging of fingerprints and this work progresses toward the ultimate goal of vibrationally detecting latent prints that would otherwise remain undetected using traditional development methods. This would, therefore, significantly increase the likelihood that any print, but particularly those exposed to thermal events or light damage, would be detected. Although the enhancement factor of SERS substrates is as yet insufficient to facilitate the detection of the most difficult prints, the conclusions reached about the feasibility of SERS fingerprint detection and especially thermal and photo-degradation of prints, include useful information for improving all methods of latent detection, both traditional and novel. The ultimate success of this technique will come with the creation of a SERS enhancing reagent that offers, and retains upon dispersal to a remote surface, the power magnitude signal enhancement purported by tailor-made, in-situ advanced substrates being tested with strong Raman responders, as opposed to weaker Raman responders such as amino and fatty acids.
Main Term(s): Police policies and procedures
Index Term(s): Fingerprint detection techniques; Fingerprint image quality; Fingerprints; Forensic sciences; Investigative techniques; Laser fingerprint detection; Latent fingerprints; NIJ final report
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