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相关概念视频

Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...

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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
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对于多态纳米晶体图书馆的元稳定兰酸硫化物进行相位工程.

Ziyun Zhong1, Hao Fu1, Chun-Hai Wang2

  • 1Tianjin Key Lab For Rare Earth Materials and Applications, Center For Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, P.R. China.

Angewandte Chemie (International ed. in English)
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概括
此摘要是机器生成的。

研究人员开发了一种新策略,用于合成具有多样化的晶体结构的稀土 (RE) 硫化物纳米晶体. 这一突破克服了创建超稳定相的局限性,使新的材料应用成为可能.

关键词:
超稳定性 超稳定性纳米晶体是一种纳米晶体.阶段阶段阶段阶段的阶段.稀土是一种稀土.硫化物硫化物是什么

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Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 无机化学 无机化学

背景情况:

  • 基于稀土 (RE) 的纳米晶体 (NC) 为各种应用提供了独特的特性.
  • 合成具有多种结晶相的RE NC,特别是转变稳定的结晶相,是由于元素特性和热力学限制而面临的重大挑战.

研究的目的:

  • 开发一种新的策略,用于兰他 (Ln) 硫化物NCs的阶段选择性合成.
  • 探索超稳定的NC框架的阶段控制演变.
  • 为了构建具有可调节性质的异构结构的Ln硫化物NC.

主要方法:

  • 过渡金属阴离子稳定策略用于阶段选择性合成.
  • 用网格能量依赖的热力学控制和面吸附诱导的动力学控制来研究相位演变.
  • 阶段设计的同位结和异构结构NCs被构建.

主要成果:

  • 成功合成了单 (m),正 (o) 和三 (t) Ln硫化物NCs.
  • 从数量上揭示了元稳定框架的形态和结构演变.
  • 构造可调节的t/m同位结和t/o异构的Ln硫化物NCs.

结论:

  • 开发的过渡金属稳定策略使得基于RE的多态NCs的合成成为可能.
  • 这种相位工程协议为访问以前无法访问的纳米晶体结构提供了可概括的方法.
  • 这些发现为更广泛的基于RE的纳米材料库铺平了道路,这些纳米材料具有量身定制的特性.