3. Si nanowires are produced from the gas phase at 700C in the presence of Au nanoparticles on a substrate. Explain Si nanowire growth mechanism using the SEM images and the Au-Si phase diagram given below. 3. Si nanowires are produced from the gas phase at 700C in the presence of Au nanoparticles on a substrate. Explain Si nanowire growth mechanism using the SEM images and the Au-Si phase diagram given below