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相关概念视频

Types Of Superconductors01:28

Types Of Superconductors

1.0K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.0K
Superconductor01:24

Superconductor

1.2K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.2K
Conductors and Insulators01:19

Conductors and Insulators

8.7K
Some materials may easily let electrical charges pass through them, while others obstruct their flow. The former are called conductors and the latter insulators. The atomic structures of materials determine whether they are conductors or insulators of electricity.
Most metals are conductors. Their atomic configuration is such that one or more electron(s) are loosely bound to the nucleus in each atom. Thus, a sea of mobile electrons are available in them, known as free electrons. Their easy...
8.7K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.4K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.4K
Electrical Conductivity01:13

Electrical Conductivity

1.2K
In perfect conductors, the electric field inside is always zero due to the abundance of free electrons, which nullify any field by flowing. As a result, any residual charge resides on the surface.
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
1.2K
Semiconductors01:22

Semiconductors

749
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
749

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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基于2D CdPS3的多功能超声波导体.

Xin Yu1,2, Wencai Ren3,4

  • 1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, P. R. China.

Nature communications
|July 6, 2023
PubMed
概括
此摘要是机器生成的。

基于二酸 (CdPS3) 纳米板的新型超离子导体使单价离子和多价离子在广泛的温度范围内具有高导电性,从而推进纳米通道离子传输应用.

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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
  • 电化学 电化学 电化学

背景情况:

  • 纳米通道中的离子运输对生命科学,过和能量储存至关重要.
  • 多价离子传输由于硬质效应和强烈的墙壁相互作用而具有挑战性,在较低的温度下移动性下降.
  • 现有的固体离子导体 (SIC) 只有在0°C以上的单价离子上才能达到实际导电性.

研究的目的:

  • 开发多功能超离子导体,能够为单价和多价离子提供高离子导电性.
  • 为了研究单层CdPS3纳米片的性能,与各种酸盐相接,作为先进的离子导体.
  • 探索这些新型材料中增强离子传输的潜在机制.

主要方法:

  • 单层CdPS3纳米片的制造,这些纳米片与各种阳离子 (例如K+,Na+,Li+,Ca2+,Mg2+,Al3+) 交叠在一起.
  • 在广泛的温度范围 (-30°C至90°C) 中测量离子导电性.
  • 对介质纳米片的离子密度和结构性质的分析.

主要成果:

  • 对于单价离子和多价离子,实现了超高的离子导电率 (0.01到0.8S/cm),超过现有的SIC一到两个数量级.
  • 在广泛的温度范围 (-30°C至90°C) 中表现出一致的高导电性.
  • 确定了高密度阴离子度 (高达~2 nm−2) 在有序的纳米通道中作为高导电性的来源.

结论:

  • 单层CdPS3纳米片与多种离子相交,代表了超离子导体设计的突破.
  • 这些材料为各种离子提供了前所未有的导电性,克服了以前SIC的局限性.
  • 这些发现为设计先进的离子导体和探索新型纳米流体现象开辟了新的途径.