4 documents found, page 1 of 1
Finite element analysis of plasma dust-acoustic waves
Areias, P.; Sikta, J.N.; Dos Santos, M.P.For dust acoustic solitary waves, we propose a finite element formulation of the fluid dusty plasma equations. To solve this continuum problem, a Petrov-Galerkin weak form with unwinding is applied. We consider an unmagnetised dusty plasma with negatively charged dust and Boltzmann distributions for electrons and ions. Nonlinearity of electron and ion number density as functions of the electrostatic potential i...
A detailed study of the Fe-doped TiO2thin films induced by pulsed deposition route
Meng, L.; Wang, Z.; Yang, L.; Ren, W.; Liu, W.; Zhang, Z.; Yang, T.; Dos Santos, M.P.Fe-doped TiO2 thin films are deposited on the (100)oriented Si and glass substrates by pulsed laser deposition technique using Fe powder doped TiO2 ceramic target. The structural and optical properties of the film have been studied in detail. The degree of film crystallinity is investigated by X-ray diffraction and confirmed by Raman scattering measurements. The stoichiometry and chemical states of Fe, Ti and O...
Structural Modification of TiO2 Nanorod Films with an Influence on the Photovol...
Meng, Lijian; Li, Can; Dos Santos, M.P.TiO2 nanorod films have been deposited on ITO substrates by dc reactive magnetron sputtering technique. The structures of these nanorod films were modified by the variation of the oxygen pressure during the sputtering process. Although all these TiO2 nanorod films deposited at different oxygen pressures show an anatase structure, the orientation of the nanorod films varies with the oxygen pressure. Only a very ...
Study of Vanadium Doped ZnO Films Prepared by dc Reactive Magnetron Sputtering ...
Meng, Lijian; Teixeira, Vasco; Dos Santos, M.P.ZnO films doped with vanadium (ZnO:V) have been prepared by dc reactive magnetron sputtering technique at different substrate temperatures (RT–500 C). The effects of the substrate temperature on ZnO:V films properties have been studied. XRD measurements show that only ZnO polycrystalline structure has been obtained, no V2O5 or VO2 crystal phase can be observed. It has been found that the film prepared at low su...