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NCJ Number: 227843 Add to Shopping cart Find in a Library
Title: Development of Advanced Raman Spectroscopy Methods and Databases For the Evaluation of Trace Evidence and the Examination of Questioned Documents (Phase I)
Author(s): John R. Lombardi; Marco Leona; Tuan Vo-Dinh; Philip Antoci
Date Published: August 2009
Page Count: 146
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: 2006-DN-BX-K034
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: Researchers from the City University of New York, Fitzpatrick Institute of Photonics at Duke University, the New York Police Department Crime Lab, and the Metropolitan Museum of Art constituted a multidisciplinary collaborative for the purpose of furthering the application of Raman spectroscopy and nondestructive surface enhanced Raman scattering (SERS) analysis techniques as applied to the evaluation of trace evidence and the examination of questioned documents.
Abstract: The work in Phase I of the project, which is covered in this report, successfully demonstrated that SERS can be used to identify organic colorants present in inks, paints, and textile fibers. The techniques developed are particularly suited for handling microscopic samples; textile dyes were successfully identified from samples as small as a 1-millimeter section of a single silk fibril of 50-micometer diameter, as well as from textiles severely degraded by burial. SERS was also effective for trace analysis of pharmaceuticals and drugs of abuse. Analytical procedures for SERS of a number of representative dyes were developed; the core of a high-quality spectral database was assembled as a proof-of-concept experiment; and innovative nondestructive approaches were investigated. To date, the colorants database includes approximately 50 natural and synthetic dyes. Raman spectroscopy is characterized by very high spectral resolution, leading to effective discrimination among various species, and it has the added advantage of allowing nondestructive, in-situ detection. The low intensity of normal Raman scattering has prevented its wide application as a sensitive spectroscopic probe, and interference from fluorescence often obscures the much weaker Raman signal. SERS has been found useful in overcoming these restrictions. Based on the success of Phase I, funding for Phase II is currently being requested. Tables, figures, and references
Main Term(s): Criminology
Index Term(s): Document analysis; Hair and fiber analysis; Ink analyses; NIJ final report; Paint analysis; Spectroscopy
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