Organogel–quantum dots hybrid materials displaying fluorescence sensitivity and structural stability towards nitric oxide
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Organogel–quantum dots hybrid materials displaying fluorescence sensitivity and structural stability towards nitric oxideAutoría
Fecha de publicación
2012-03Editor
Royal Society of ChemistryTipo de documento
info:eu-repo/semantics/articlePalabras clave / Materias
Resumen
Nanoparticle doped hybrid organogels were prepared using the pseudopeptidic macrocycle 1 and CdSe/
ZnS quantum dots (QDs). The new semi-solid materials show the same thermal stability and excellent
optical transparency ... [+]
Nanoparticle doped hybrid organogels were prepared using the pseudopeptidic macrocycle 1 and CdSe/
ZnS quantum dots (QDs). The new semi-solid materials show the same thermal stability and excellent
optical transparency as compared to the parent organogel in the absence of the nanoparticles, but they
are fluorescent due to the presence of embedded semiconductor nanocrystals. The fluorescence lifetime
of a QD–organogel composite is reported for the first time, and it was found to be similar to that of the
QDs in solution in a related solvent, independent of the concentration of gelator. The chemical sensing
ability of the hybrid organogels towards gaseous nitric oxide was investigated by steady-state
fluorescence spectroscopy. The gels show fluorescence sensitivity towards NO ranging from 0.05 to
0.5 (vol%). The results reported herein constitute a proof of principle of the potential of the hybrid
supramolecular soft materials to develop nitric oxide sensor devices of practical application, especially
because the semi-solid state of the organogel is preserved after interaction with the analyte. This is
remarkable since, for the vast majority of organogels with analytical capabilities reported so far, the
signaling mechanism relies upon the disassembly of the supramolecular structure. [-]
Publicado en
Soft Matter, 2012, 8Derechos de acceso
@ The Royal Society of Chemistry 2012
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