Synthesis and Characterization of SiO2-Sheathed ZnSe Nanowires

Bulletin of the Korean chemical society

Soyeon An¹  Changhyun Jin¹  Chongmu Lee¹  Hyunsu Kim¹ 

关键词: Nanostructures;    Luminescence;    Scanning electron microscopy (SEM);    Transmission electron microscopy (TEM);    X-ray diffraction;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

ZnSe/SiO2 coaxial nanowires were synthesized by a two-step process: thermal evaporation of ZnSe powders and sputter-deposition of SiO2. Two different types of nanowires are observed: thin rod-like ones with a few to a few tens of nanometers in diameter and up to a few hundred of micrometers in length and wide belt-like ones with a few micrometers in width. Room-temperature photoluminescence (PL) measurement showed that ZnSe/ SiO2 coaxial nanowires had an orange emission band centered at approximately 610 nm. The intensity of the orange emission from the SiO2-sheathed ZnSe nanowires was enhanced significantly by annealing in a reducing atmosphere whereas it was degraded by annealing in an oxidizing atmosphere. The origins of the PL changes by annealing are discussed based on the energy-dispersive X-ray spectroscopy analysis results.

【 授权许可】

Unknown