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- Electroplated nickel-tungsten alloys transmission electron microscopy nanocrystalline bimodal grain size multiple twinned particle (mtp) mechanical-behavior electrodeposition deformation microstructure particles metals growth baths (1)
- Integrated optics devices planar waveguide selective area doping techniques rare-earth incorporation wave-guide laser fiber fabrication liquid-drops doped-glass amplifiers (1)
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Structural Investigations On Nanocrystalline Ni-W Alloy Films By Transmission Electron Microscopy, Haseeb Asma
Structural Investigations On Nanocrystalline Ni-W Alloy Films By Transmission Electron Microscopy, Haseeb Asma
Haseeb ASMA
Electrode posited Ni-W alloys have been investigated in the as-deposited state by transmission electron microscopy in order to investigate the microstructural features in dependence of the tungsten content. Within the tungsten content range from 7 at.% up to 12 at.%, the microstructure is nanocrystalline characterized by a bimodal grain size distribution, consisting out of 20 to 200 nm sized grains and also larger grains with several 100 mm characteristic dimension. No clear trend in microstructure formation is visible with W content or deposition conditions in the investigated W content range. Only solid solution phase characteristics were observed. The lattice constant …
Spreading Profile Of Dopant Solution On Pre-Sintered Silica Layers For Selective Area Doping Of Integrated Optic Planar Glass Samples, Haseeb Asma
Haseeb ASMA
The spread profile of potassium-permanganate (KMnO(4)) dye on a porous pre-sintered silica layer deposited via Flame Hydrolysis Deposition is presented. The work is aimed at controlling the dopant profile on the resulting glass layer for optically passive and active devices integration. KMnO(4) is used as it allows visual qualification of its spread on the soot layer. Pre-sintered silica layers allow for application of dopants into the glass matrix via adsorption and pore retention. Selective area doping is achieved by applying specific volumes of the dye onto pre-selected areas on the sample using a micropipette. Higher dye volumes applied would result …