We investigated the interwire distance dependence on the growth kinetics of vertical, high-yield InAs nanowire arrays on Si 111 grown by catalyst-free selective area molecular beam epitaxy MBE . Utilizing lithographically defined SiO2 nanomasks on Si 111 with regular hole patterns, catalyst-free and site-selective growth of vertically 111 -oriented InAs nanowires was achieved with very high yie...

The objective of our work is to improve the osseointegration of titanium (and its alloys) used in dental and orthopedic applications. To do this, we have been coating these metals with glasses whose compositions are based upon Bioglass®, which is a bioactive glass developed by Hench et al. Bioactive glasses have the property of forming an apatite layer (and therefore can chemically bond to bone...

The behavior of tapered graded-index polymer optical fibers is analyzed computationally for different refractive indices of the surrounding medium. This serves to clarify the main parameters affecting their possible performance as refractive-index sensors and extends an existing study of similar structures in glass fibers. The ray-tracing method is employed, its specific implementation is expla...

There is accumulating evidence that strontium-containing biomaterials have positive effects on bone tissue repair. We investigated the in vitro effect of a new Sr-doped bioactive glass manufactured by the sol-gel method on osteoblast viability and differentiation. Osteoblasts isolated from foetal mouse calvaria were cultured in the presence of bioactive glass particles; particles were undoped (...

Chalcogenide glasses are based on sulfur, selenium and tellurium elements, and have been studied for several decades regarding different applications. Among them, selenide glasses exhibit excellent infrared transmission in the 1 to 15 µm region. Due to their good thermo-mechanical properties, these glasses could be easily shaped into optical devices such as lenses and optical fibers. During the...