Infrared absorption property of silicon carbide-silica nanocables synthesized by ethanol pyrolysis

Abstract

A controllable synthesis method for SiC-SiO${}_2$ nanocables has been proposed. The diameter of SiC core and thickness of SiO${}_2$ shell were changed by adjusting the flow ratio between Ar dilution gas and ethanol precursor. With increasing the flow, the enhancement of 1137cm${}^{-1}$ peak was observed from fourier transform infrared spectroscopy (FTIR) spectra. This peak is considered to be originated from a highly disordered surface structure of SiO${}_2$ shell which was enhanced with increasing the flow. The FTIR spectra show the 910cm${}^{-1}$ peak which is attributed to surface phonon resonance in the nanostructure of SiC exited by p-polarized field component.