AbstractNanocrystalline silicon microwires are self-heated through microsecond voltage pulses. Nonlinear changes in current level are observed during the voltage pulse, which end with melting of the microwires. Liquid silicon resistivity is extracted as 65.9 ± 6.1 μΩ.cm from the minimum resistance of the wire during the voltage pulse. The extracted resistivity is in good agreement with previously reported values.
Silicon microwires (MWs) previously synthesized using the VLS method with gold catalyst are being carburized at 1100°C under methane aiming to their conversion to SiC. SEM, TEM as well as XPS and Raman spectroscopy were used for structural and morphological characterization. After carburization achievement, SiC is found to be polycrystalline with a high density of stacking faults associated to an increase of surface roughness. Directions for the carburization process optimization are given.
Multibranched silicon microstructure, such as branched root-like microwires and branched coralline-like micorwires, have been rationally synthesized via a simple one-step, inexpensive, and catalyst-free fabrication technique. The multiple-branched root-like silicon microwires which obtained at 0.07% Sr addition of Al-Si alloys have lengths of several tens of micrometers and its transverse sizes range from 300 to 500 nm, while the transverse sizes of multiple-branched coralline-like silicon microwires are much smaller. The recommend of patterning process of multiple-branched silicon microwires show that selective corrosion of Sr modified Al-Si alloys is that the aluminum is wiped out while the silicon micorwires as a hidden microstructure revealed by etching.
Integration of Molybdenum-Doped, Hydrogen-Annealed BiVO4 with Silicon Microwires for Photoelectrochemical Applications