title: Application of mercaptosuccinic acid capped CdTe quantum dots for latent fingermark development.
abstract: The aqueous synthesis of mercaptosuccinic acid (MSA) capped CdTe quantum dots (QDs) solution for quickly and sensitively developing latent fingermarks is described. The rapid growth mechanism of CdTe/MSA QDs, which depends on the molecule structure of MSA, is briefly discussed and compared with that of thioglycolic acid (TGA) and mercaptopropionic acid (MPA) capped CdTe QDs. Development of latent fingermarks with the synthesized CdTe/MSA QDs was faster and the ridge details were clearer compared with CdTe/TGA QDs. In addition, latent fingermarks developed with CdTe/MSA QDs showed less background and better contrast than that of gentian violet or rhodamine 6G. Latent fingermarks could be well developed on black tape, scotch tape, tinfoil, aluminum alloy, stainless steel as well as on the adhesive side of yellow tape, even when the latter were aged up to seven days. As immersion time greatly reduced to 10 s by using CdTe/MSA QDs, a preliminary result of latent fingermark development by spraying was presented also.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
authors.forename: Xuejiao
authors.initials: X
authors.lastname: Yu
authors.forename: Jianjun
authors.initials: J
authors.lastname: Liu
authors.forename: Shengli
authors.initials: S
authors.lastname: Zuo
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Yu
authors.forename: Kaiyang
authors.initials: K
authors.lastname: Cai
authors.forename: Ruiqin
authors.initials: R
authors.lastname: Yang
mesh_terms: D000328:Adult; D019187:Cadmium Compounds / Q000737:chemistry*; D003878:Dermatoglyphics; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D005840:Gentian Violet / Q000737:chemistry; D006801:Humans; D010781:Photography; D045663:Quantum Dots; D012235:Rhodamines / Q000737:chemistry; D013499:Surface Properties; D013864:Thioglycolates / Q000737:chemistry; D013870:Thiomalates / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D012235:Rhodamines; D013864:Thioglycolates; D013870:Thiomalates; C026188:rhodamine 6G; C017487:2-mercaptoacetate; C046062:2-thiomalic acid; D005840:Gentian Violet
keywords: Aqueous synthesis; CdTe QDs; Latent fingermark; Mercaptosuccinic acid