Thermally Induced Structural Transformations on Polymorphous Silicon

Thermally induced structural transformations on polymorphous silicon

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 have been studied by calorimetry and evolved gas analysis as a complementary technique. The observed behavior has been compared to that of conventional hydrogenated amor...

Thermally Induced Silane Dehydrocoupling on Silicon Nanostructures

Organic trihydridosilanes can be grafted to hydrogen-terminated porous Si nanostructures with no catalyst. The reaction proceeds efficiently at 80 °C, and it shows little sensitivity to air or water impurities. The modified surfaces are stable to corrosive aqueous solutions and common organic solvents. Octadecylsilane H3 Si(CH2 )17 CH3 , and functional silanes H3 Si(CH2 )11 Br, H3 Si(CH2 )9 CH=...

Mechanically induced transformations in silicon

Mechanicky indukované premeny kremíka V práci sa študujú zmeny veľkosti častíc a štruktúry kremíka pri vibračnom a planetárnom mletí vo vzduchu a v kvapalinách rôznej permitivity (metanol, acetón a benzén). Kinetika redukcie veľkosti častíc a zmien štruktúry závisí od relatívneho zrýchlenia pohybu mlecích telies a od povahy mlecieho prostredia. Najefektívnejšie zjemnenie a ochrana povrchu prášk...

Polymorphous Transformations in Alkaline-Earth Silicates

Thermally induced structural changes in immunoglobulin E.

The ability of immunoglobulin E (IgE) to bind to the cell membrane of basophiles and mast cells is progressively lost when the molecule is heated at 56”. In the present study, we have investigated the structural changes induced by heating under conditions known to destroy this biological function, although direct measurements of cytotropic activity were not made. After 30 min at 56” circular di...