Application of CdSe nanoparticle suspension for developing latent fingermarks on the sticky side of adhesives.
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.
Wang
Yuan Feng
YF
Department of Forensic Science, Chinese People's Public Security University, Beijing 100038, China.
Yang
Rui Qin
RQ
Wang
Yan Ji
YJ
Shi
Zhi Xia
ZX
Liu
Jian Jun
JJ
D000269:Adhesives; D019187:Cadmium Compounds / Q000737:chemistry*; D003878:Dermatoglyphics; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007477:Ions; D049329:Nanostructures; D018036:Selenium Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013864:Thioglycolates
D000269:Adhesives; D019187:Cadmium Compounds; D007477:Ions; D018036:Selenium Compounds; D013864:Thioglycolates; C017487:2-mercaptoacetate; C058667:cadmium selenide