Sol-gel synthesis of hybrid organic-inorganic monoliths doped with colloidal CdSe/ZnS core-shell nanocrystals (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Sol-gel synthesis of hybrid organic-inorganic monoliths doped with colloidal CdSe/ZnS core-shell nanocrystals (Articolo in rivista) (literal)

Anno

• 2003-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1023/A:1020749921471 (literal)

Alternative label

• Epifani M., Leo G., Lomascolo M., and Vasanelli L. (2003)
  Sol-gel synthesis of hybrid organic-inorganic monoliths doped with colloidal CdSe/ZnS core-shell nanocrystals
  in Journal of sol-gel science and technology
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Epifani M., Leo G., Lomascolo M., and Vasanelli L. (literal)

Pagina inizio

• 441 (literal)

Pagina fine

• 446 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 26 (literal)

Rivista

• Journal of sol-gel science and technology (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• M. Epifani, M. Lomascolo, L. Vasanelli: IMM-CNR, sez. Lecce L. Manna: Chemistry Department, University of California, Berkeley (literal)

Titolo

• Sol-gel synthesis of hybrid organic-inorganic monoliths doped with colloidal CdSe/ZnS core-shell nanocrystals (literal)

Abstract

• Colloidal CdSe/ZnS core-shell nanocrystals, with a narrow size distribution, were dispersed in a hybrid sol resulting from the hydrolysis of tetraethylorthosilicate and 3-glycidoxypropyltrimethoxysilane (GLYMO). In order to reduce the gelation time and the exposure of the nanoparticles to air, several catalysts of the GLYMO epoxy ring opening were employed for the sol preparation, such as imidazole, methyl-imidazole, pyridine, benzylamine, propylamine. The role of the various catalysts was monitored by optical absorption measurements in the near infrared region, by observing the evolution of the epoxy bands. Imidazole was found to provide the fastest gelation and the best results in terms of bubble disappearance from the gel structure. The variation in the optical properties of the semiconductor nanoparticles embedded in the matrix was monitored as a function of the gelation time and was compared to the optical absorption and photoluminescence spectra of the nanoparticles dissolved in a chloroform solution. A decrease in the gelation-time results in a closer resemblance between the optical properties of the CdSe/ZnS doped monoliths and those of the particles dissolved in the solvent, before incorporation in the matrix. The photoluminescence of the CdSe/ZnS nanocrystals is not bleached after they are trapped in the glassy matrix. (literal)

Prodotto di

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)

Autore CNR

• MAURO LOMASCOLO (Persona)
• MAURO SALVATORE EPIFANI (Unità di personale interno)
• GABRIELLA LEO (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Sol-gel synthesis of hybrid organic-inorganic monoliths doped with colloidal CdSe/ZnS core-shell nanocrystals" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)

Autore CNR di

• MAURO LOMASCOLO (Persona)
• MAURO SALVATORE EPIFANI (Unità di personale interno)
• GABRIELLA LEO (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of sol-gel science and technology (Rivista)

Insieme di parole chiave di

• Keywords of "Sol-gel synthesis of hybrid organic-inorganic monoliths doped with colloidal CdSe/ZnS core-shell nanocrystals" (Insieme di parole chiave)