Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Phase Transitions02:31

Phase Transitions

18.8K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
18.8K
Phase Diagrams02:39

Phase Diagrams

39.7K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
39.7K
Phase Diagram01:19

Phase Diagram

5.7K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
5.7K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

12.3K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.3K
Phase Changes01:19

Phase Changes

4.2K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
4.2K
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

3.0K
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
3.0K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Observation of non-adiabatic non-Abelian braiding of matter waves.

Nature communications·2026
Same author

Advances in starch-based binary and ternary complexes with lipids and proteins: mechanisms, digestibility, and applications in low-glycemic foods.

Food & function·2026
Same author

Inhibiting fear memory recall-induced oligodendrogenesis rescues PTSD-like behaviors.

Molecular psychiatry·2026
Same author

Efficacy and safety of hepatectomy in hepatitis B-related hepatocellular carcinoma with compensated versus recompensated cirrhosis: A propensity score matching study.

Surgery·2026
Same author

Integrated single-cell and bulk transcriptomic analyses reveal a stem-like epithelial subpopulation in adenocarcinoma of the esophagogastric junction and identify VASN as a novel regulator of tumor stemness.

Frontiers in immunology·2026
Same author

Efficient and Precise Force Field Optimization for Biomolecules Using DPA-3.

Journal of chemical information and modeling·2026

相关实验视频

Updated: Jun 5, 2025

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
12:37

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

12.3K

通过实体空间指示器观察多样化的拓相变.

Yong-Heng Lu1,2, Yao Wang1,2, Feng Mei3,4

  • 1Center for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
概括

研究人员观察了光子芯片中的拓相位过渡,可以直接检测散装拓变化和边缘状态的创建/破坏. 这推动了对工程材料中高阶拓相的研究.

关键词:
大量状态测量测量五秒激光直接写入格子.拓学的相位过渡.拓的光子学 拓的光子学

更多相关视频

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
10:08

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy

Published on: October 24, 2017

9.1K
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.1K

相关实验视频

Last Updated: Jun 5, 2025

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
12:37

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

12.3K
Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
10:08

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy

Published on: October 24, 2017

9.1K
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.1K

科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 量子光学是一种量子光学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 拓阶段提供了对混乱的固有保护,通过人工材料的边缘状态来证明.
  • 拓相过渡是与散带拓学相关的量子关键现象,与对称性变化不同.
  • 直接观察大量的拓相变仍然是一个重大的实验挑战.

研究的目的:

  • 在理论和实验上证明了多样化的拓相变的直接观测.
  • 利用单一的光子芯片平台来观察微不足道,第一阶段和第二阶段拓相之间的过渡.
  • 在这些过渡过程中调查拓边缘状态的创建和破坏.

主要方法:

  • 制造一个单一的光子芯片,集成324×33波导.
  • 理论建模和实验观测的光子进化在批量.
  • 使用实时空间指标来检测带隙关闭,表示拓相位过渡.
  • 间隙拓边缘状态的表征.

主要成果:

  • 直接观察微不足道到第一阶段,微不足道到第二阶段和第一到第二阶段的拓相位过渡.
  • 通过光子进化检测过渡的批量,与带隙关闭相关.
  • 观察与相位过渡相关的断层拓边缘状态的产生和破坏.
  • 展示基于散装状态的路线,用于研究高维和高阶拓特征.

结论:

  • 该研究提供了一种直接的,基于散装状态的方法,用于观察光子系统中的拓相位过渡.
  • 工程光子芯片平台允许对拓现象进行多功能探索,包括高阶阶段.
  • 这项工作为研究拓机制和人工材料中的应用开辟了新的途径.