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Publications (3)4.41 Total impact

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    ABSTRACT: Utilization of CdSe nanoparticle suspension for latent fingermarks on a multitude of no-porous and semi-porous surfaces has been demonstrated in this paper. Whether it’s dark or light, the color of adhesives has no effect on the results of developing, because of the strong fluorescence excited by irradiation with UV LEDs. Enough contrast could be obtained for imaging. As an effective stabilizer for suspension which is commonly used in fingermark developing, Tween 20 with different concentration was also applied for better results. However, it didn’t work for nanometer-sized particles, which have already been stable in suspension. To broaden the scope of its application, different excitation systems were adopted. Well-contrast images could be obtained when 365 nm UV light, 440 nm blue light and daylight were applied. TiO2 SPR (Small Particle Reagent) and gentian violet were used to compare with CdSe nanoparticle suspension under daylight. The results indicated that it produced significantly less background development and better contrast.
    Journal of Saudi Chemical Society. 01/2011;
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    ABSTRACT: Nanometer-sized fluorescent particles were synthesized in an aqueous solution using TGA (mercaptoacetic acid) as the stabilizer. The prepared solution was characterized by fluorescence spectroscopy and applied for detection of latent fingermarks on adhesives. The effects of stabilizer, precursor, pH value, the concentration of cadmium ion and shell structure on fluorescence were also discussed. The results indicated that the intensity of fluorescence was remarkably increased and the selectivity was well improved when using CdSe nanoparticles, it produced significantly less background development and better contrast after 15 min developing process.
    Forensic science international 02/2009; 185(1-3):96-9. · 2.10 Impact Factor
  • [show abstract] [hide abstract]
    ABSTRACT: Nanometer-sized fluorescent particles were synthesized in an aqueous solution using TGA (mercaptoacetic acid) as the stabilizer. The prepared solution was characterized by fluorescence spectroscopy and applied for detection of latent fingermarks on adhesives. The effects of stabilizer, precursor, pH value, the concentration of cadmium ion and shell structure on fluorescence were also discussed. The results indicated that the intensity of fluorescence was remarkably increased and the selectivity was well improved when using CdSe nanoparticles; it produced significantly less background development and better contrast after 15 min developing process.
    Forensic Science International 01/2009; 185:96. · 2.31 Impact Factor