Synthesis and photoluminescence property of boron carbide nanowires  

作　　者：鲍丽宏 李晨 田园 田继发 惠超 王兴军 申承民 高鸿钧 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2008年第12期4585-4591,共7页中国物理B（英文版）

基　　金：Project supported by the National High Technology Development Program of China (Grant No 2007AA03Z305);the state Key Development Program for Basic Research of China (Grant No 2007CB935503);the National Science Foundation of China (Grants Nos 60571045, 60620120443 and Guo-JI He-Zuo)

摘　　要：Large scale, high density boron carbide nanowires have been synthesized by using an improved carbothermal reduction method with B/B203/C powder precursors under an argon flow at 1100℃. The boron carbide nanowires are 5-10 μm in length and 80-100 nm in diameter. Transmission electron microscopy （TEM） and selected area electron diffraction （SAED） characterizations show that the boron carbide nanowire has a B4C rhombohedral structure with good crystallization. The Raman spectrum of the as-grown boron carbide nanowires is consistent with that of a B4C structure consisting of B11C icosahedra and C-B-C chains. The room temperature photoluminescence spectrum of the boron carbide nanowires exhibits a visible range of emission centred at 638 nm.Large scale, high density boron carbide nanowires have been synthesized by using an improved carbothermal reduction method with B/B203/C powder precursors under an argon flow at 1100℃. The boron carbide nanowires are 5-10 μm in length and 80-100 nm in diameter. Transmission electron microscopy （TEM） and selected area electron diffraction （SAED） characterizations show that the boron carbide nanowire has a B4C rhombohedral structure with good crystallization. The Raman spectrum of the as-grown boron carbide nanowires is consistent with that of a B4C structure consisting of B11C icosahedra and C-B-C chains. The room temperature photoluminescence spectrum of the boron carbide nanowires exhibits a visible range of emission centred at 638 nm.

关 键 词：carbothermal reduction vapour-liquid-solid （VLS） RAMAN PHOTOLUMINESCENCE 

分 类 号：O482.31[理学—固体物理]