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Proceedings Paper

Water phase transfer of oleic capped semiconductor nanocrystals mediated by alfa-cyclodextrins
Author(s): Nicoletta Depalo; Roberto Comparelli; Marinella Striccoli; Maria Lucia Curri; Lucia Catucci; Angela Agostiano
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Paper Abstract

In this work the host-guest chemistry of α-cyclodextrin has been investigated in order to mediate the phase transfer from organic solvent to water of blue emitting CdS nanocrystals. Oleic acid capped CdS nanocrystals have been synthesized by using colloidal chemistry routes in non-coordinating solvents and effectively transferred from hexane phase in aqueous solution. The transfer has been mediated by the formation of an inclusion complex between nanocrystal surfactant and α-cyclodextrins. The optical properties of the nanocrystal water solution, the effect of cyclodextrin concentration and the nanocrystal size on the phase transfer efficiency have been investigated. Finally a layer-by-layer assembling procedure of CdS nanocrystals complexed by cyclodextrins has been exploited to set up a supramolecular hierarchical multilayer system with high level of structural complexity.

Paper Details

Date Published: 28 June 2005
PDF: 7 pages
Proc. SPIE 5838, Nanotechnology II, (28 June 2005); doi: 10.1117/12.608598
Show Author Affiliations
Nicoletta Depalo, Univ. di Bari (Italy)
Roberto Comparelli, CNR IPCF, Univ. di Bari (Italy)
Marinella Striccoli, CNR IPCF, Univ. di Bari (Italy)
Maria Lucia Curri, CNR IPCF, Univ. di Bari (Italy)
Lucia Catucci, Univ. di Bari (Italy)
Angela Agostiano, Univ. di Bari (Italy)
CNR IPCF, Univ. di Bari (Italy)

Published in SPIE Proceedings Vol. 5838:
Nanotechnology II
Paolo Lugli; Laszlo B. Kish; Javier Mateos, Editor(s)

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