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Application of dye intercalated bentonite for developing latent fingerprints

Chen, Quan / Kerk, Wai Tat / Soutar, Andrew M. / Zeng, Xian Ting

AbstractTwo 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.

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Application of dye intercalated bentonite for developing latent fingerprints

Chen, Quan / Kerk, Wai Tat / Soutar, Andrew M. / Zeng, Xian Ting

AbstractTwo 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.

Application of dye intercalated bentonite for developing latent fingerprints

Chen, Quan / Kerk, Wai Tat / Soutar, Andrew M. / Zeng, Xian Ting

AbstractTwo 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.

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Title:

Application of dye intercalated bentonite for developing latent fingerprints

Contributors:

Chen, Quan (author) / Kerk, Wai Tat (author) / Soutar, Andrew M. (author) / Zeng, Xian Ting (author)

Published in:

Applied Clay Science ; 44 ; 156-160

Publication date:

2009-01-22

Size:

5 pages

ISSN:

DOI:

https://doi.org/10.1016/j.clay.2009.01.011

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Bentonite , Cationic dye , Latent fingerprints , Hydrophobic , Organosilane

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