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Semiconductor and metal oxide nanoparticles: Synthesis, physical properties and industrial application.

机译:半导体和金属氧化物纳米粒子:合成,物理性质和工业应用。

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摘要

This thesis addresses various aspects of nanoparticles which attract considerable scientific interest.;In chapter 2 and 3, photoionization of individual nanocrystals (CdSe/CdS and CdSe/CdS/ZnS) has been studied by Electric Force Microscopy (EFM). A different response have been observed for two types of high-quality NCs. The magnitude of the charge due to photoionization was found to be wavelength dependent which implies a "hot-electron" process.;A new metastable phase of vanadium dioxide hydrate with one-dimensional nanostructure has been synthesized through hydrothermal recrystallization which is described in chapter 4. We propose a hydrating-exfoliating-splitting mechanism to elucidate the formation of nanowires and nanoribbons.;Finally, we have conducted synthesis of HfO2 nanoparticles with different crystallinity and morphology. Among them, the amorphous form of HfO2 nanoparticles shows a high solubility in organic solvent which makes it a possible material for high refractive index fluid used in photolithography industry. There is a restriction due to the absorption at the UV region of spectrum. All the details are talked about in chapter 5 and chapter 6.
机译:本论文针对纳米粒子的各个方面,引起了广泛的科学兴趣。在第2章和第3章中,通过电动显微镜(EFM)研究了单个纳米晶体(CdSe / CdS和CdSe / CdS / ZnS)的光电离。对于两种类型的高质量NC,已经观察到不同的响应。发现由于光电离而产生的电荷的大小与波长有关,这意味着“热电子”过程。通过水热重结晶合成了具有一维纳米结构的水合二氧化钒的新亚稳相,这在第四章中进行了描述。我们提出了一种水合-脱落-剥离的机理,以阐明纳米线和纳米带的形成;最后,我们进行了具有不同结晶度和形态的HfO2纳米粒子的合成。其中,HfO2纳米颗粒的无定形形式在有机溶剂中显示出高溶解度,这使其成为用于光刻行业的高折射率流体的可能材料。由于在光谱的UV区域的吸收而存在限制。所有详细信息在第5章和第6章中讨论。

著录项

  • 作者

    Li, Shu.;

  • 作者单位

    Columbia University.;

  • 授予单位 Columbia University.;
  • 学科 Chemistry Physical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 116 p.
  • 总页数 116
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:38:24

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