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相关概念视频

Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Lattice Energies of Ionic Crystals01:27

Lattice Energies of Ionic Crystals

Lattice energy represents the energy released when gaseous cations and anions combine to form an ionic solid, reflecting the strength of electrostatic interactions within the crystal. This process is fundamentally governed by Coulombic attraction between oppositely charged ions, where the potential energy varies inversely with the interionic distance and directly with the product of ionic charges. As ions approach one another, the electrostatic energy becomes increasingly negative, indicating a...
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...
Imperfections in Crystal Structure: Non-Stoichiometric Defects01:29

Imperfections in Crystal Structure: Non-Stoichiometric Defects

Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...

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相关实验视频

Updated: Jul 10, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

导电性和场效应晶体管的La2@C80金属烯.

Shin-ichiro Kobayashi1, Satoshi Mori, Satoru Iida

  • 1Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.

Journal of the American Chemical Society
|July 3, 2003
PubMed
概括

我们将在二金属 (La2@C80) 中演示场效应晶体管操作. n型半导体的行为表明,载体通过封装的La离子进行传导,其低流动性表明跳跃机制.

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates

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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Published on: April 12, 2019

科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 纳米技术纳米技术

背景情况:

  • 二甲富勒烯是一种新型碳化合物,具有潜在的电子应用.
  • 兰二金属烯 (La2@C80) 由于封装的金属离子,具有独特的电子特性.

研究的目的:

  • 为了研究La2@C80.80的场效应晶体管 (FET) 性能.
  • 为了阐明La2@C80薄膜中的电荷传输机制.

主要方法:

  • 使用La2@C80.0.制造薄膜设备.
  • 在高真空和室温条件下对设备性能的描述.
  • 分析电传输特性,以确定半导体的类型和移动性.

主要成果:

  • 证明了La2@C80的FET运行,具有二面体对称性.
  • 观察到的n型半导体行为,其移动性为1.1 x 10^-4 cm^2/V s.
  • 将n型导电归因于封装的离子与最低的无人分子轨道 (LUMO) 相互作用.

结论:

  • 拉2@C80表现出适用于晶体管应用的n型半导体性能.
  • 低流动性表明一种分子间跳跃的运输机制.
  • 需要进一步的研究,通过解决内在和外在因素来优化流动性.