Size-dependent extinction coefficients of PbS quantum dots (Articolo in rivista)

Type

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

Label

• Size-dependent extinction coefficients of PbS quantum dots (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

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

• 10.1021/ja063166u (literal)

Alternative label

• Cademartiri L, Montanari E, Calestani G, Migliori A, Guagliardi A, Ozin GA (2006)
  Size-dependent extinction coefficients of PbS quantum dots
  in Journal of the American Chemical Society (Print)
  (literal)

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

• Cademartiri L, Montanari E, Calestani G, Migliori A, Guagliardi A, Ozin GA (literal)

Pagina inizio

• 10337 (literal)

Pagina fine

• 10346 (literal)

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

• http://pubs.acs.org/doi/abs/10.1021/ja063166u (literal)

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

• 128 (literal)

Rivista

• Journal of the American Chemical Society (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Toronto, Mat Chem Res Grp, Lash Miller Chem Labs, Dept Chem, Toronto, ON M5S 3H6, Canada; Univ Parma, Dipartimento Chim, GIAF, I-43100 Parma, Italy; CNR, IMM, Area Ric Bologna, I-40126 Bologna, Italy; CNR, IC, I-70126 Bari, Italy (literal)

Titolo

• Size-dependent extinction coefficients of PbS quantum dots (literal)

Abstract

• We report here on a detailed study on PbS colloidal quantum dots. A characterization via X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) allowed us to reliably determine the diameter and the shape of the nanocrystals. These data, together with second-derivative analysis of the absorption spectra, allowed us to determine the size dependence of seven transitions in the absorption spectrum; some of these transitions were identified on the basis of their normalized confinement energy. The size dependence of the first excitonic transition was best modeled by a fourband envelope approach which considers the anisotropy of the band edges (Andreev, A. D.; Lipovskii, A. A. Phys. Rev. B: Condens. Matter Mater. Phys. 1999, 59, 15402-15404). The extinction coefficients were calculated using concentrations obtained from inductively coupled plasma atomic emission spectrometry (ICP-AES), and their size dependence was found to follow a power law with exponent equal to similar to 2.5. In contrast with what was expected from the effective mass approximation, the per particle absorption cross section of the lowest transition was found to be strongly dependent on the particle size. (literal)

Prodotto di

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Sviluppo di Modelli Fisici, Simulazioni e Tecniche di Caratterizzazione per le Nanoscienze (MD.P05.004.001) (Modulo)
• Institute of Crystallography (IC) (Istituto)
• Metodologie Cristallografiche applicate a nano diffrazione e nanoimaging (PM.P06.002.002) (Modulo)

Autore CNR

• ANDREA MIGLIORI (Persona)
• ANTONIETTA GUAGLIARDI (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Size-dependent extinction coefficients of PbS quantum dots" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of Crystallography (IC) (Istituto)
• Institute for microelectronics and microsystems (IMM) (Istituto)
• Sviluppo di Modelli Fisici, Simulazioni e Tecniche di Caratterizzazione per le Nanoscienze (MD.P05.004.001) (Modulo)
• Metodologie Cristallografiche applicate a nano diffrazione e nanoimaging (PM.P06.002.002) (Modulo)

Autore CNR di

• ANDREA MIGLIORI (Persona)
• ANTONIETTA GUAGLIARDI (Unità di personale interno)

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

• Journal of the American Chemical Society (Rivista)

Insieme di parole chiave di

• Keywords of "Size-dependent extinction coefficients of PbS quantum dots" (Insieme di parole chiave)