Application of nanoparticles for the enhancement of latent fingerprints

Matias Sametband; Itzhak Shweky; Uri Banin; Daniel Mandler; Joseph Almog

doi:10.1039/B618966K

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Chemical Communications

Issue 11, 2007

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Application of nanoparticles for the enhancement of latent fingerprints

Matias Sametband , Itzhak Shweky , Uri Banin , Daniel Mandler and Joseph Almog

Chem. Commun., 2007, 1142-1144

DOI: 10.1039/B618966K
Received 02 Jan 2007, Accepted 05 Feb 2007
First published on the web 19 Feb 2007

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Two different types of nanoparticles dissolved in organic solution, gold stabilized by n-alkanethiols and CdSe/ZnS stabilized by n-alkaneamine, adhere preferentially to the ridges of latent fingerprints; the gold deposits catalyze silver electroless deposition from “Silver Physical Developer” (Ag-PD), an aqueous solution containing silver colloids stabilized by cationic surfactants, to form dark impressions of the ridge details; the hydrophobic capped gold nanoparticles significantly improve the intensity and clarity of the developed prints compared with Ag-PD alone; fingermarks treated with CdSe/ZnS nanoparticles can be viewed directly, due to their fluorescence under UV illumination.

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Matias Sametband
Itzhak Shweky
Uri Banin
Daniel Mandler
Joseph Almog

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Chemical Communications

Application of nanoparticles for the enhancement of latent fingerprints

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