Xuejiao Yu, Shengli Zuo, Hai Xiong, Yingchun Yu, Prof. Jianjun Liu and Prof. Ruiqin Yang Synthesis of Water-Soluble, Multicolored Fluorescent ZnxCd1−xSe Quantum Dots for Developing Latent Fingerprints ChemPlusChem 78
Latent fingerprints: ZnxCd1−xSe quantum dots (QDs) were prepared in water through cation exchange between Cd2+ and ZnSe QDs. With increasing Cd2+, the emission wavelengths of these QDs shifts from 430 to 578 nm, the diffraction peaks shift to lower 2θ angles, and the unit cell volumes increase. These multicolored QDs were used to develop latent fingerprints by varying the fluorescent color of the QDs to produce the best images (see figure; MPA=mercaptopropionic acid).
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