Abstract
Abstract Amorphous SiO 2 nanowires were prepared by heating Si powder and Au-coated Si(1 1 1) substrates for different times. The SiO 2 nanowires were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results show that large amounts of amorphous SiO 2 nanowires with a diameter of about 40 nm were formed on the entire surface of the substrates. Au particles were observed at the tip of the SiO 2 nanowires, which is consistent with the well-known vapor–liquid–solid (VLS) process. It is found that the annealing time affects the morphology of the products. Finally, the growth mechanism of the SiO 2 nanowires was discussed.
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