Synthesis of Core-Shell SiOxCarbon Nanofibers on Silicon Substrates by Ultrasonic Spray Pyrolysis

Abstract EN

We synthesized the core-shell SiOx/carbon nanofibers with diameters of 200–300 nm using ultrasonic spray pyrolysis with a phosphorus/ethanol mixture.

High-resolution transmission electron microscopy (HRTEM) and energy-dispersive spectroscopy (EDS) investigations confirmed the core-shell structure, which consisted of a core of SiOx and a shell of amorphous carbon.

The phosphorus atoms corroded the entire silicon substrate surface, and the Si-P liquid-catalyzed the solid-liquid-solid mechanism is proposed to explain the growth of the core-shell SiOx/carbon nanofibers.