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相关概念视频

Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

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Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
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The Pauli Exclusion Principle03:06

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The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
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Electron Configurations02:46

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Electron configurations and orbital diagrams can be determined by applying the Aufbau principle (each added electron occupies the subshell of lowest energy available), Pauli exclusion principle (no two electrons can have the same set of four quantum numbers), and Hund’s rule of maximum multiplicity (whenever possible, electrons retain unpaired spins in degenerate orbitals).
The relative energies of the subshells determine the order in which atomic orbitals are filled (1s, 2s, 2p, 3s, 3p,...
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Hybridization of Atomic Orbitals II03:35

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sp3d and sp3d 2 Hybridization
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The Aufbau Principle and Hund's Rule03:02

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To determine the electron configuration for any particular atom, we can build the structures in the order of atomic numbers. Beginning with hydrogen, and continuing across the periods of the periodic table, we add one proton at a time to the nucleus and one electron to the proper subshell until we have described the electron configurations of all the elements. This procedure is called the aufbau principle, from the German word aufbau (“to build up”). Each added electron occupies the...
48.7K
Structure of Benzene: Molecular Orbital Model01:18

Structure of Benzene: Molecular Orbital Model

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According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
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Updated: Jul 4, 2025

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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高流动性的五边形二维PdSe2中的量子八位数

Yuxin Zhang1, Haidong Tian1, Huaixuan Li2,3

  • 1Department of Physics, The Ohio State University, Columbus, OH, 43210, USA.

Nature communications
|January 26, 2024
PubMed
概括
此摘要是机器生成的。

空气稳定,少层二化 (PdSe2) 场效应晶体管具有高流动性和大和电流. 磁传输研究揭示了独特的量子振荡,为新的电子和自旋电子应用铺平了道路.

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科学领域:

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

背景情况:

  • 二维 (2D) 材料具有独特的特性,可以通过外部刺激来调整.
  • 对于电子产品而言,理想的二维材料需要高流动性,空气稳定性和大规模合成.
  • 原子薄材料对于下一代电子设备至关重要.

研究的目的:

  • 为了证明空气稳定的场效应晶体管 (FET) 使用少数层二化 (PdSe2).
  • 在不同温度下研究PdSe2 FETs的电子传输特性.
  • 探索PdSe2在先进电子和自旋电子应用中的潜力.

主要方法:

  • 使用在六角化 (hBN) 之间嵌入的少数层 PdSe2 的场效应晶体管的制造.
  • 电气表征包括和电流和300K和2K的场效应移动性的测量.
  • 低温磁传输研究以分析量子振荡和退化.

主要成果:

  • 已证明具有高和电流 (>350μA/μm) 的稳定在空气中的PdSe2 FET.
  • 在300K时达到~700cm^2/Vs,在2K时达到~10,000cm^2/Vs的高场效移动性.
  • 观察到独特的量子振荡,具有2倍的自旋和4倍的谷变性,可以通过磁场调整.

结论:

  • 几层PdSe2是一种有前途的2D材料,用于高性能,空气稳定的电子设备.
  • 观察到的量子现象表明,有可能实现量子霍尔旋转和轨道铁磁.
  • PdSe2晶体管为探索新型量子现象和未来的自旋电子应用提供了一个平台.