Core-shell SiC/SiO2 heterostructures in nanowires

• Main Authors: Wu, Renbing, Zha, Bailin, Wang, Liuying, Zhou, Kun, Pan, Yi
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Mechanical engineering
• Online Access: https://hdl.handle.net/10356/105226; http://hdl.handle.net/10220/17084; http://dx.doi.org/10.1002/pssa.201127459
• Institution: Nanyang Technological University

This paper presents a simple vapour deposition method for one-step synthesis of SiC//SiO2 core-shell heterostructured nanowires. The phases, structures and morphologies of the synthesized core-shell heterostructures are systemically studied by field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and high-resolution transmission electron microscopy. The results show that these heterostructures consist of a single crystalline SiC core of 20∼30 nm diameter covered by a uniform layer, about 15 nm thickness of amorphous SiO2. Such heterostructures were grown based on the vapour–solid mechanism and the deposition way has an important influence on their morphology. A unique optical property has also been found in their photoluminescence spectra that have blue shift relative to the bulk SiC.