Application of dye intercalated bentonite for developing latent fingerprints

Two types of cationic dye, Rhodamine 6G (R6G) and Methylene Blue (MB), intercalated bentonite have been developed to visualize latent fingerprints. The dyes were first absorbed on bentonite particles by an ion exchange process and the particle surface was subsequently modified by phenyltrimethoxysil...

Full description

Saved in:
Bibliographic Details
Published inApplied clay science Vol. 44; no. 1; pp. 156 - 160
Main Authors Chen, Quan, Kerk, Wai Tat, Soutar, Andrew M., Zeng, Xian Ting
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier B.V 01.04.2009
Elsevier
Subjects
Bentonite
Cationic dye
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydrophobic
Latent fingerprints
Mineralogy
Organosilane
Silicates
Organosilane
Bentonite
Cationic dye
Latent fingerprints
Hydrophobic
ion exchange
particles
Online AccessGet full text

Cover

More Information
Summary:Two types of cationic dye, Rhodamine 6G (R6G) and Methylene Blue (MB), intercalated bentonite have been developed to visualize latent fingerprints. The dyes were first absorbed on bentonite particles by an ion exchange process and the particle surface was subsequently modified by phenyltrimethoxysilane (PTMOS). Resulting particles retained incorporated dye with good affinity and their surfaces were rendered organophilic due to the planar aromatic ring of PTMOS grafted on the surface and edges of layered bentonite particles. Such organophilic properties promoted attachment of particles to finger mark residues. Particles were harvested as a powder and applied as a dusting agent using brushes.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2009.01.011