Elementary processes governing V2AlC chemical etching in HF

Elementary processes governing the evolution of road networks

Urbanisation is a fundamental phenomenon whose quantitative characterisation is still inadequate. We report here the empirical analysis of a unique data set regarding almost 200 years of evolution of the road network in a large area located north of Milan (Italy). We find that urbanisation is characterised by the homogenisation of cell shapes, and by the stability throughout time of high-centra...

Elementary processes in chemical vapor deposition: quantum chemical approach

Chemical vapor deposition (CVD) is one of the key technologies for the epitaxial crystal growth of semiconductors. In order to obtain high-performance devices, atomically controlled thin films are required. Layer by layer growth consists of various processes, i.e ., the thermal decomposition of precursors, the adsorption of growing species, their surface migration, two-dimensional nucleation, t...

Molecular beam studies of elementary chemical processes.

The experimental investigation of elementary chemical reactions is presently in a very exciting period. The advance in modern microscopic experimental methods, especially crossed molecular beams and laser technology, has made it possible to explore the dynamics and mechanisms of important elementary chemical reactions in great detail. Through the continued accumulation of detailed and reliable ...

Fabrication of p-Type Nano-porous Silicon Prepared by Electrochemical Etching Technique in HF-Ethanol and HF-Ethanol-H2O Solutions

Nano-porous silicon were simply prepared from p-type single crystalline silicon wafer by electrochemical etching technique via exerting constant current density in two different HF-Ethanol and HF-Ethanol-H2O solutions. The mesoporous silicon layers were characterized by field emission scanning electron microscopy and scanning electron microscopy. The results demonstrate that the width of nano-p...

Elementary Mechanisms Governing the Dynamics of Silica