| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1164156 | Analytica Chimica Acta | 2014 | 8 Pages |
•Fluorescent nanocomposite based on the inclusion of CdSe quantum dots in porous phosphate heterostructures.•Characterized by FTIR, XRD and fluorescence spectroscopies.•Deconvolution of the emission spectra was confirmed by using multivariate curve resolution (MCR) method.•Application for fingerprint detection and analysis on different non-porous surfaces.
A fluorescent nanocomposite based on the inclusion of CdSe quantum dots in porous phosphate heterostructures, functionalized with amino groups (PPH-NH2@CdSe), was synthesized, characterized and used for fingerprint detection. The main scopes of this work were first to develop a friendly chemical powder for detecting latent fingerprints, especially in non-porous surfaces; their further intercalation in PPH structure enables not to spread the fluorescent nanoparticles, for that reason very good fluorescent images can be obtained. The fingerprints, obtained on different non-porous surfaces such as iron tweezers, mobile telephone screen and magnetic band of a credit card, treated with this powder emit a pale orange luminescence under ultraviolet excitation. A further image processing consists of contrast enhancement that allows obtaining positive matches according to the information supplied from a police database, and showed to be more effective than that obtained with the non-processed images. Experimental results illustrate the effectiveness of proposed methods.
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