Buscar
Mostrando ítems 1-10 de 1298
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
(1999-12-01)
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
(1999-12-01)
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
Spectroscopic and thermal characterization in poly(p-phenylene vinylene)/sol-gel silica sample
(Elsevier B.V., 2003-12-01)
The absorption and luminescence spectra for the poly(p-phenylene vinylene)/sol-gel silica with different thermal treatments were measured. A considerable increase in the luminescence was observed for the polymer introduced ...
Spectroscopic and thermal characterization in poly(p-phenylene vinylene)/sol-gel silica sample
(Elsevier B.V., 2003-12-01)
The absorption and luminescence spectra for the poly(p-phenylene vinylene)/sol-gel silica with different thermal treatments were measured. A considerable increase in the luminescence was observed for the polymer introduced ...
Broadband NIR emission in novel sol-gel Er3+-doped SiO 2-Nb2O5 glass ceramic planar waveguides for photonic applications
(2013-01-01)
This paper reports on the sol-gel preparation and structural and optical characterization of new Er3+-doped SiO2-Nb 2O5 nanocomposite planar waveguides. Erbium-doped (100-x)SiO2-xNb2O5 waveguides were deposited on ...
Zirconia foams prepared by integration of the sol-gel method and dual soft template techniques
(Elsevier B.V., 2008-11-01)
This paper presents a new method to produce basic zirconium sulfate foams showing hierarchic porosity, based on a dual pores templating process by oil drops and gas bubbles dispersed into a hydrosol, followed by its fast ...
Zirconia foams prepared by integration of the sol-gel method and dual soft template techniques
(Elsevier B.V., 2008-11-01)
This paper presents a new method to produce basic zirconium sulfate foams showing hierarchic porosity, based on a dual pores templating process by oil drops and gas bubbles dispersed into a hydrosol, followed by its fast ...
Relevance of sol–gel transition and spinodal decomposition for hierarchical porosity structure of monolithic alumina
(2021-01-01)
In situ techniques were used to investigate the hierarchical porous structure of alumina monoliths formed by the combined processes of sol–gel transition and spinodal phase separation. The addition of low molecular weight ...