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相关概念视频

Van der Waals Interactions01:24

Van der Waals Interactions

71.2K
Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
71.2K
Van der Waals Equation01:10

Van der Waals Equation

6.3K
The ideal gas law is an approximation that works well at high temperatures and low pressures. The van der Waals equation of state (named after the Dutch physicist Johannes van der Waals, 1837−1923) improves it by considering two factors.
First, the attractive forces between molecules, which are stronger at higher densities and reduce the pressure, are considered by adding to the pressure a term equal to the square of the molar density multiplied by a positive coefficient a. Second, the volume...
6.3K
Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation04:01

Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation

39.0K
Thus far, the ideal gas law, PV = nRT, has been applied to a variety of different types of problems, ranging from reaction stoichiometry and empirical and molecular formula problems to determining the density and molar mass of a gas. However, the behavior of a gas is often non-ideal, meaning that the observed relationships between its pressure, volume, and temperature are not accurately described by the gas laws.
39.0K
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

64.7K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
64.7K
Van de Graaff Generator01:15

Van de Graaff Generator

2.4K
Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...
2.4K
Protein Folding01:22

Protein Folding

127.1K
Overview
127.1K

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相关实验视频

Updated: Jan 28, 2026

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
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Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

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范德瓦尔斯纳米化学反应器

Zhaoyi Joy Zheng1,2, Haosen Guan1, Danrui Ni3

  • 1Department of Physics, Princeton University, Princeton, New Jersey 08544, United States.

Nano letters
|January 26, 2026
PubMed
概括
此摘要是机器生成的。

范德瓦尔斯 (vdW) 堆作为纳米化学反应堆,用于合成高质量的量子材料单晶. 这种多功能方法使得元素和化合物晶体的生长成为先进电子发现的必要条件.

关键词:
纳米反应器的纳米反应器综合合成是一种合成.范德瓦尔斯的材料

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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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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:

  • 对于新材料来说,合成高质量的单晶用于量子电子是很困难的.
  • 现有的方法在可扩展性和材料兼容性方面存在局限性.

研究的目的:

  • 介绍和证明范德瓦尔斯 (vdW) 堆作为单晶合成纳米化学反应器的实用性.
  • 探索这种方法在种植各种量子材料方面的广泛适用性.

主要方法:

  • 利用vdW堆作为纳米反应器,将原子薄的反应物封装在惰性vdW层中.
  • 实现了纳米封闭合成,产生了封装的单晶.
  • 合成的元素和- (Pd-Te) 化合物晶体.

主要成果:

  • 通过结构表征,通过合成和Pd-Te单晶的高晶质得到证实.
  • 观察了晶体中的内在半导体间隙.
  • 在减少含量的非静电测量PdTe1-x中发现了超导性.

结论:

  • vdW纳米反应器为单晶合成提供了可泛化,芯片集成和纳米制造兼容的方法.
  • 这种方法扩大了用于电子应用的量子材料的可访问性.
  • 该技术适用于各种加工条件和材料类型.