http://www.cnr.it/ontology/cnr/individuo/prodotto/ID32367

Structural and optical properties of SnO2 nanobelts and nanowires (Articolo in rivista)

Type

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

Label

Structural and optical properties of SnO2 nanobelts and nanowires (Articolo in rivista) (literal)

Anno

2005-01-01T00:00:00+01:00 (literal)

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

10.1016/j.msec.2005.07.014 (literal)

Alternative label

Calestani D. a; Zha M. a; Zappettini A. a; Lazzarini L. a; Salviati G. a; Zanotti L. a; Sberveglieri G. b (2005)
Structural and optical properties of SnO2 nanobelts and nanowires
in Materials science & engineering. C, Biomimetic materials, sensors and systems (Print); ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
(literal)

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

Calestani D. a; Zha M. a; Zappettini A. a; Lazzarini L. a; Salviati G. a; Zanotti L. a; Sberveglieri G. b (literal)

Pagina inizio

625 (literal)

Pagina fine

630 (literal)

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

25 (literal)

Rivista

Materials science & engineering. C, Biomimetic materials, sensors and systems (Rivista)

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

5-8 (literal)

Note

Scopu (literal)
ISI Web of Science (WOS) (literal)

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

a IMEM, CNR, I-43010 Fontanini Parma, Italy; b Univ. Brescia, INFM, Sensor Lab, I-25133 Brescia, Italy (literal)

Titolo

Structural and optical properties of SnO2 nanobelts and nanowires (literal)

Abstract

1D semiconducting SnO2 nanowires and nanobelts are successfully grown by low cost Chemical Vapour Deposition directly on large area (100 mm2) Al2O3, SiO2 and Si substrates. The nanocrystals are distributed in a very uniform entanglement in the growth plane over a deposited thickness of about 0.3 mm. Their lateral size ranges from 50 to 700 nm and their length can achieve several hundreds of micrometers. Transmission Electron Microscopy reveals either the nanowires and the nanobelts grow in the tetragonal Rutile structure parallel to a <101> direction. Diffraction contrast analyses and selected area diffraction investigations show the nanowires are single crystals without defects while the nanobelts often present twins inside. An almost cylindrical shape and an average diameter of about 30-50 nm for the smallest nanowire is reported. X-ray diffraction investigations exclude the presence of spurious phases. A broad band structured in two emissions peaked at about 460 nm and 570 nm is revealed by large area Photoluminescence and Cathodoluminescence. No evidence of near band edge transition is found. Single nanobelt spectroscopy carried out by Cathodoluminescence inside the Scanning Electron Microscope shows that reducing the lateral dimension of the nanobelts from 500 to 50 nm, a blue shift of the main emission band of about 20 nm is found at room temperature. The possible role of Oxygen vacancies and surface / volume ratio on the absence of the near band edge emission and on the blue shift of Cathodoluminescence spectra from single nanocrystals is discussed. (literal)

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