Field emission from one-dimensional single-crystalline NdB6 nanowires
来源期刊：Journal of Rare Earths2013年第2期
论文作者：范庆华 张勤远 赵彦明 丁琪伟
文章页码：145 - 148
摘 要：A facile catalysis-free method was utilized to synthesize functional neodymium hexaboride （NdB6 ） nanowires of single crystal using Nd powders and BCl 3 as starting materials. The XRD pattern confirmed that a single phase NdB 6 could be obtained. Raman-spectra elucidated the active vibrational modes of the hexaborides. The TEM images clearly showed that the hexaborides were submicron in size with a cubic morphology. The field emission of these one-dimensional NdB6 nanowires showed a low field emission turn-on （5.55 V/μm at a current density of 10 μA/cm2 ）, and high current density with a field enhancement factor of 1037. The emission current density and the electric field followed the Fowler-Nordheim （F-N） relationship. The good performance for field emission was attributed to the single-crystalline structure and the nanowire geometry.
范庆华1，张勤远2,3，赵彦明1，丁琪伟1
1. Department of Physics,South China University of Technology2. MOE Key Lab of Specially Functional Materials,South China University of Technology3. School of Electrical and Electronic Engineering,Nanyang Technological University
摘 要：A facile catalysis-free method was utilized to synthesize functional neodymium hexaboride （NdB6 ） nanowires of single crystal using Nd powders and BCl 3 as starting materials. The XRD pattern confirmed that a single phase NdB 6 could be obtained. Raman-spectra elucidated the active vibrational modes of the hexaborides. The TEM images clearly showed that the hexaborides were submicron in size with a cubic morphology. The field emission of these one-dimensional NdB6 nanowires showed a low field emission turn-on （5.55 V/μm at a current density of 10 μA/cm2 ）, and high current density with a field enhancement factor of 1037. The emission current density and the electric field followed the Fowler-Nordheim （F-N） relationship. The good performance for field emission was attributed to the single-crystalline structure and the nanowire geometry.
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