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Improved field emission properties of alpha-Fe2O3 nanoflakes with current aging treatment and morphology optimization

机译:具有当前老化处理和形态优化的α-Fe2O3纳米薄片的抗场排放性能

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摘要

alpha-Fe2O3 nanomaterials were synthesized by thermal oxidation of pure iron foil and the effects of current aging treatment and morphology on their field emission properties were systematically investigated. The current aging treatment was found to be an efficient method to improve the field emission properties of alpha-Fe2O3 nanoflakes. The emission current density was largely enhanced from 0.05-5.70 mA cm(-2) under an applied electrical field of 7.8 MV m(-1), and their threshold field decreased from than 11.0-6.6 MV m(-1) after the current aging treatment. The mechanism of the improvement in the field emission performance of alpha-Fe2O3 nanoflakes induced by the current aging treatment is discussed. alpha-Fe2O3 nanostructures with various morphologies were synthesized by adjusting the growth temperatures between 300 degrees C-450 degrees C to optimize their morphologies. alpha-Fe2O3 nanoflakes synthesized at 350 degrees C were superior field emitters with a low threshold field of 5.1MV m(-1), high current density of 63.4 mA cm(-2), and stable emission, which demonstrated that alpha-Fe2O3 nanoflakes could be a promising material for application as field emitters.
机译:通过纯铁箔的热氧化合成α-Fe2O3纳米材料,系统地研究了当前老化处理和形态的影响。发现目前的老化处理是改善α-Fe2O3纳米薄片的场发射性能的有效方法。在7.8mV m(-1)的施加电场下,发射电流密度大大增强了0.05-5.70 mA cm(-2),并且在电流之后,它们的阈值场从11.0-6.6 mV m(-1)降低老化治疗。探讨了当前老化治疗诱导的α-Fe2O3纳米薄片的抗场排放性能的机制。通过调节300度C-450℃的生长温度来合成具有各种形态的α-Fe2O3纳米结构,以优化它们的形态。在350摄氏度合成的alpha-Fe2O3纳米薄片是优异的场发射器,低阈值场5.1mV m(-1),高电流密度为63.4 mA cm(-2),并稳定排放,表明α-Fe2O3纳米薄片可能是申请作为现场发射者的有希望的材料。

著录项

  • 来源
    《Nanotechnology》 |2018年第8期|共12页
  • 作者单位

    Sun Yat Sen Univ Sch Elect &

    Informat Technol State Key Lab Optoelect Mat &

    Technol Guangdong Prov Key Lab Display Mat &

    Technol Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Sch Elect &

    Informat Technol State Key Lab Optoelect Mat &

    Technol Guangdong Prov Key Lab Display Mat &

    Technol Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Sch Elect &

    Informat Technol State Key Lab Optoelect Mat &

    Technol Guangdong Prov Key Lab Display Mat &

    Technol Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Sch Elect &

    Informat Technol State Key Lab Optoelect Mat &

    Technol Guangdong Prov Key Lab Display Mat &

    Technol Guangzhou 510275 Guangdong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    alpha-Fe2O3 nanoflakes; field emission; current aging treatment; morphology optimization;

    机译:Alpha-Fe2O3纳米薄片;场发射;当前老化处理;形态优化;

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