skip navigation

PUBLICATIONS

Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Virtual Library collection. To conduct further searches of the collection, visit the Virtual Library. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

 

NCJ Number: 221728 Find in a Library
Title: Doped Hydrophobic Silica Nano- and Micro-Particles as Novel Agents for Developing Latent Fingerprints
Journal: Forensic Science International  Volume:174  Issue:1  Dated:January 2008  Pages:26-34
Author(s): Brenden J. Theaker; Katherine E. Hudson; Frederick J. Rowell
Date Published: January 2008
Page Count: 9
Publisher: http://www.elsevier.com 
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: This study provides information on novel hydrophobic silica-based articles that have been developed to visualize latent fingerprints.
Abstract: Novel hydrophobic silica based particles have been developed to visualize latent fingerprints. Development of latent fingerprints generally involves either use of a dusting agent that adheres to the sticky material deposited on the surface following contact, or a chemical developer that produces the visual coloration due to chemical interaction of the applied developer with chemicals commonly found within the deposit materials on the surface. A direct route to the synthesis of equivalent nanoparticles, which is simpler and can be applied to production of a variety of colored and fluorescent agents, and to agents that have colored and magnetizable particles embedded within them. How such particles can be used in suspension as developing agents for latent finger prints and in an agglomerated form such as dusting agents is described, as well as examples provided. A range of stable silica nanoparticles have been produced which have embedded within them a variety of dyes and sub-particles. The composition of the particles has been designed to maximize both hydrophobic and ionic interactions between a variety of color and fluorescent reporter molecules, and the silicate backbone within the particles. The resulting doped particles retain the incorporated dyes with high affinity. In addition, a variety of sub-particles have also been invented to introduce colored or magnetizable hydrophobic particles. The particles can be harvested as nanoparticles or microparticles. The former are applied to latent fingerprints as an aqueous suspension, and the latter as a dusting agent using brushes or a magnetic wand. The resulting prints have good definition; examples of the prints produced using these agents are provided. Figures, references
Main Term(s): Fingerprint detection techniques; Latent fingerprints; Scientific techniques
Index Term(s): Data analysis; Mineral analysis; United Kingdom (UK)
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=243612

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.