Solid luminescent CdSe‐thiolated porous phosphate heterostructures. Application in fingermark detection in different surfaces |
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| Authors: | M Algarra J Jiménez‐Jiménez M S Miranda B B Campos R Moreno‐Tost E Rodriguez‐Castellón J C G Esteves da Silva |
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| Institution: | 1. Centro de Geologia da Universidade do Porto e Departamento de Geociências, Ambiente e Ordenamento do Território do Porto Faculdade de Ciências da, Universidade do Porto, , 4169‐007 Porto, Portugal;2. Departamento de Química Inorganica, Facultad de Ciencias, Universidad de Málaga, , 29071 Málaga, Spain;3. Universidad Internacional de Andalucía, Sede Tecnológica de Málaga, , Málaga, Spain;4. Centro de Investiga??o em Química (CIQ‐UP), Faculdade de Ciências da Universidade do Porto, , 4169‐007 Porto, Portugal |
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| Abstract: | A fluorescent hybrid material (PPH‐S‐CdSe), which comprises cadmium selenide sulphide nanoparticles assembled onto thiol functionalised porous phosphate heterostructures (PPH‐SH), was synthesised in aqueous media. This material presents a high stability towards photo‐degradation. The obtained nanocomposite was characterised by various techniques such as Fourier transform infrared spectroscopy, energy dispersive X‐ray, transmission electron microscopy (TEM), X‐ray diffraction, X‐ray photoelectron spectroscopy and fluorescence spectroscopy. This fluorescent material showed a red emission at 576 nm combined with other at 473 nm, explained as different CdS0.42Se0.58 nanoparticles size, supported by TEM images. It was suitable for latent fingermark analysis in a wide range of surfaces. Because of its sensitivity and low cost, it is an actual alternative to conventional powdering materials. Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | fingermarks CdSSe quantum dots porous phosphate heterostructure fluorescence nanocomposite XPS |
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