Preliminary studies into fluorescent semiconductor nanorods for the detection of latent fingermarks: Size matters,shape matters |
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Authors: | Sorour Shahbazi Dechao Chen Guohua Jia Simon W. Lewis |
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Affiliation: | Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia |
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Abstract: | The effect of the shape of semiconductor nanocrystals on their performance for visualising latent fingermarks was investigated for the first time. Highly luminescent CdSe/CdS core/shell nanocrystals in rod and spherical shapes were synthesised in organic solvent and transferred to aqueous solution using ligand exchange. The 3-mercaptopropionic acid coated nanorods and nanospheres were characterised using electron microscopy and UV-visible absorbance and luminescence spectrophotometry. A simple and rapid development of fresh to less than a week-old natural fingermarks from 4 donors (male and female) on non-porous surfaces including glass slides, aluminium foil and germanium disks using both CdSe/CdS core/shell nanorods and spherical dots was achieved, wherein nanorods demonstrated an enhanced development of ridge details in comparison to the spherical dots. |
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Keywords: | Latent fingermarks Nanotechnology Nanoparticle morphology Quantum dots Nanorods Luminescence |
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