Now showing items 1-5 of 5
Cr+3 distribution in Al1 and Al2 Sites of alexandrite (BeAl2O4: Cr3+) induced by annealing, investigated by optical spectroscopy
(Energy and Power Engineering, 2010) [Artigo]
In order to investigate optical properties of alexandrite, the present work deals with the influence of thermal annealing on optical absorption and luminescence spectra of natural samples. The exposure time to heat treatment ...
Numerical simulation of the liquid phase in SnO2 thin film deposition by sol-gel-dip-coating
(Journal of Sol-Gel Science and Technology, 2010-09-01) [Artigo]
The fluid flow of the liquid phase in the sol-gel-dip-coating process for SnO2 thin film deposition is numerically simulated. This calculation yields useful information on the velocity distribution close to the substrate, ...
Structural Characterization of Nanocrystalline Sb-Doped SnO2 Xerogels by Multiedge X-ray Absorption Spectroscopy
(Journal of Physical Chemistry C, 2010-11-18) [Artigo]
Multiedge XAS data are presented for Sb-doped SnO2 xerogels dried at 200 degrees C and fired at 550 degrees C, aiming to determine the location of antimony doping in the host matrix and then to understand the role that the ...
Raman and photoluminescence of Er3+-doped SnO2 obtained via the sol-gel technique from solutions with distinct pH
(Optical Materials, 2010-11-01) [Artigo]
Raman and infrared photoluminescence measurements are carried out for Er3+-doped SnO2 pellets (hard-pressed powders) obtained by the sol-gel technique from colloidal suspensions with distinct pH. Raman data indicate that ...
Interface Formation and Electrical Transport in SnO2:Eu3+/GaAs Heterojunction Deposited by Sol-Gel Dip-Coating and Resistive Evaporation
(Journal of Electronic Materials, 2010-08-01) [Artigo]
The natural n-type conduction of tin dioxide (SnO2) may be compensated by trivalent rare-earth doping. In this work, SnO2 thin films doped with Eu3+ have been deposited by the sol-gel dip-coating (SGDC) process, topped by ...