Iris Publishers Material Science Open Access Journal

Using New Concepts in Nanoscience to Develop New Materials Material Science The foundation of material science has always been largely rooted in chemistry and the elements of periodic table, many of which have not yet been completely studied and whose full potential has still not been determined. In fact, it is possible to view material science not as “a” science in and of itself, but rather a combination of multiple scientific disciplines, including chemistry, physics and mechanics. The science of materials chemistry is closely associated with chemical structures which vary in scale, with small scale atomic, nanometer and micrometer structures typically having greater importance. When studying the characteristics of a new structure including its associated chemical, physical, mechanical properties etc. understanding these properties at multiple scales from atomic, up to micrometer is very important in determining the material’s range of functionalities. Completing this research and ex...

  Growth Study of Silicon Nanowires Synthesized Via Plasma-Assisted VLS Using Tin Catalysts Material Science In the present work, silicon nanowires (SiNWs) have been grown on crystalline silicon (Si) (100) oriented and hydrogenated amorphous silicon a-Si:H coated c-Si (a-Si: H/c-Si) substrates by plasma-enhanced chemical vapor deposition (PECVD) via the vapor-liquid-solid (VLS) process at different temperature. Tin (Sn) catalyst coating with a thickness of 1 nm were used as metal catalysts. A hydrogen plasma was applied to reduce the oxide and to form Sn droplets. SiNWs were then grown by introducing pure silane (SiH4) into the reactor with a flow rate of 5 sccm and a chamber pressure of 1.33 mbar, at a substrate temperature between 400 and 600°C. Their morphological and surface characteristics have been investigated using Hitachi S4800 scanning electron microscopy (SEM). Morphology obtained from SEM shows tapered growth of NWs with a distinctively sharp tip.   For more In...