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Visible photoluminescence from Ge nanoclusters implanted in nanoporous aluminum oxide films by W.M. de Azevedo; E.F. da Silva Jr.; E.A. de Vasconcelos; H. Boudinov is a Engineering article available to read on EtoBox.

What is Visible photoluminescence from Ge nanoclusters implanted in nanoporous aluminum oxide films about?

Nanoporous aluminum oxide (Al 2 O 3 ) films with uniform porous size of 45 nm prepared by the electrochemical process in inorganic acid medium were implanted at room temperature (RT) with 120 keV Ge C ions with a fluence of 1.2!10 16 cm K2 . The nucleation and growths of Ge nanoparticles, were obtained by thermal annealing of the implanted samples at the temperature range of 200-600 8C. The size and distribution of the nanoparticles were characterized by photoluminescence (PL) measurements. The photoluminescence measurements as a function of the annealing temperature shows that at low annealing temperature (200 8C), the sample presents a low intensity and broad emission band centered at 5456 A ̊consistent with emission band characteristics of nanocluster of Ge with diameter in the range of 4-8 nm, as the annealing temperature increases to 400 8C the PL intensity increases by a factor of almost 20 and the emission band suffers a small red shift. The intensity increases can be related to the increase of the number of Ge nanocluster. At the annealing temperature of 600 8C, the emission band is considerably red shifted by almost 172 A ̊and the emission intensity decreases significant

Who reads Visible photoluminescence from Ge nanoclusters implanted in nanoporous aluminum oxide films?

Author

W.M. de Azevedo; E.F. da Silva Jr.; E.A. de Vasconcelos; H. Boudinov

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd; Elsevier BV (ISSN 0026-2692)

Published

2005

Language

EN

Field

Engineering (Physical Sciences)