Data di Pubblicazione:
2008
Citazione:
Nanostructured polyelectrolyte-based system as a toolbox for metal ions detection / E. Ronzitti, V. Caorsi, A. Diaspro. - In: JOURNAL OF FLUORESCENCE. - ISSN 1053-0509. - 18:2(2008 Mar), pp. 375-381.
Abstract:
The capability of certain heavy metal ions to induce fluorescence decrease by a quenching mechanism suggested us to design and build a sensor potentially tunable for different ions at different concentrations. We propose a quenching-based sensor exploiting a nanostructured architecture in which fluorescent molecules (the sensing probe) are entrapped to recognize a specific analyte (heavy metal ions) through an optical transduction. The polyelectrolyte nanostructured system, named nanocapsule, improves the fluorophore-ion quenching sensitivity allowing a micromolar detection. Furthermore we couple our sensor with an electrical device in order to refine the sensing procedure: the electric field created allows a metal ions spatial gradient, necessary to detect a specific element on a single sample solution, avoiding a comparative analysis with an intensity reference value. Results obtained will show the advantages and the potentialities of our system as a smart toolbox for metal ions detection
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Quenching ; nanocapsule ; fluorosensor ; metal ion
Elenco autori:
E. Ronzitti, V. Caorsi, A. Diaspro
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