张猛   

张猛,副教授,硕士生导师,“泰山学者”团队核心成员。江苏省“科技副总”、青岛市十二届青年科技奖、青岛科技大学“科研新秀”、中国晶体学会会员、材料研究学会专业会员、中国化工学会高级会员、全国材料与器件科学家智库磁性材料与器件专家委员会常务委员、中国仪器仪表学会仪表功能材料分会电子元器件关键材料与技术专业委员会委员、国家自然科学基金/山东省自然科学基金/青岛市高新技术企业评审专家、SCI期刊《Frontiers ...Detials

Improve field emission properties of SiC nanowires by doping rare earth cerium under different methane ventilation rate

Release time:2023-10-19  Hits:

  • Key Words:SILICON-CARBIDE NANOWIRES; ZNO NANOWIRES; FABRICATION; MORPHOLOGY; DENSITY; ARRAYS
  • Abstract:Cerium (Ce)-doped SiC nanowires (NWs) were synthesized by chemical vapor reaction (CVR) method under diverse methane (CH4) ventilation rates, with milled Si-SiO2 mixed powders being used as silicon source. Afterwards, the products were characterized to be beta-SiC. In addition, FT-IR analysis reveals that the vibration intensity of Si-O group has been significantly reduced after doping with Ce, and the contraction vibration peak of Ce-O group appears at 882 cm(-1). After Ce doping, the energy gap shows a decreasing trend from 1.37 to 0.9 eV, as determined by Material Studion 4.2. At the CH4 ventilation rate of 0.12 sccm, the content of Ce displays a relatively high value of 0.93 at%, the coating layer of SiO2 is about 12 nm, and the turn-on field achieves a minimum value of about 2.47 V mu m(-1). A synergetic mechanism was proposed for explaining the influence of the morphology and Ce concentration on the field emission (FE) properties of Ce-doped SiC NWs. Findings in the present study may provide certain foundation for future studies examining the FE properties of additional one-dimensional nano-material.
  • Volume:277
  • Issue:wu
  • Translation or Not:no