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Browsing by Author "Farjas, J."

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Calorimetry of dehydrogenation and dangling-bond recombination in several hydrogenated amorphous silicon materials

Roura, P.; Farjas, J.; Rath, C.; Serra-Miralles, J.; Bertran, E.; Roca I Cabarrocas, P. (2006)

Differential scanning calorimetry (DSC) was used to study the dehydrogenation processes that take place in three hydrogenated amorphous silicon materials: nanoparticles, polymorphous silicon, and conventional device-quality ...
Kinetic study of the oxide-assisted catalyst-free synthesis of silicon nitride nanowires

Farjas, J.; Pinyol, A.; Rath, C.; Roura, P.; Bertran, E. (2006-05)

The synthesis of Si 3N 4 nanowires from the reaction of silicon nanoparticles with N 2 in the 1200-1440°C temperature range is reported. The nitridation conditions are such that the reaction with nitrogen is favoured by ...
Si3N4 single-crystal nanowires grown from silicon micro- and nanoparticles near the threshold of passive oxidation

Farjas, J.; Rath, C.; Pinyol, A.; Roura, P.; Bertran, E. (2005-11-07)

A simple and most promising oxide-assisted catalyst-free method is used to prepare silicon nitride nanowires that give rise to high yield in a short time. After a brief analysis of the state of the art, we reveal the crucial ...
Thermally induced structural transformations on polymorphous silicon

Rath, C.; Farjas, J.; Roura, P.; Kail, F.; Roca i Cabarrocas, P.; Bertran, E. (2005-09)

Polymorphous Si is a nanostructured form of hydrogenated amorphous Si that contains a small fraction of Si nanocrystals or clusters. Its thermally induced transformations such as relaxation, dehydrogenation, and crystallization ...

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