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

Chirality02:25

Chirality

25.5K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
25.5K
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

17.8K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
17.8K
Stereoisomerism of Cyclic Compounds02:33

Stereoisomerism of Cyclic Compounds

9.3K
In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
9.3K
Prochirality02:05

Prochirality

4.0K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
4.0K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

6.0K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
6.0K
Chirality in Nature02:30

Chirality in Nature

13.9K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.9K

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

Molecular characterization and marker development of a novel soft wheat high-molecular-weight glutenin subunit 1Dy12<sub>1</sub> for improving cookie-baking quality.

Journal of the science of food and agriculture·2026
Same author

Defining the Therapeutic Ceiling of Endovascular Thrombectomy in Large-Core Stroke: Beyond the Limits of ASPECTS.

Stroke·2026
Same author

Comparison of Histology, Growth Characteristics, Gut Microbiota, and Metabolites in the Meat and Organs of Deoxynivalenol-Contaminated Piglets.

Food science of animal resources·2026
Same author

Growth Characteristics, Blood Biochemistry, Histology, and Metabolic Profile of Muscle and Different Tissues: Toxicity Study of Deoxynivalenol.

Food science of animal resources·2026
Same author

Time-Dependent Association Between Breast Cancer and Risk of Ischemic Stroke: A Nationwide Cohort Study.

Neurology·2026
Same author

Non-Equilibrium Synthesis of Whitlockite Assisted by Localized H<sub>2</sub>O Vapor Pressure.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

相关实验视频

Updated: Sep 17, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.6K

在折叠的无异型范德瓦尔斯材料中逆向状反应.

Sunwoong Yang1, Minwoo Lee2, Junkyoung Kim2

  • 1Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea.

The journal of physical chemistry letters
|June 30, 2025
PubMed
概括

研究人员开发了一种新的折叠方法,在像二硫化物这样的异型德瓦尔斯材料中创建明显的垂直方向. 这种技术可以为光电子应用提供依赖于奇拉度的光学和电子特性.

更多相关视频

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

7.7K
Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
08:49

Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures

Published on: December 1, 2023

1.6K

相关实验视频

Last Updated: Sep 17, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.6K
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

7.7K
Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
08:49

Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures

Published on: December 1, 2023

1.6K

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:

  • 在平面内异构的范德瓦尔斯 (vdW) 材料表现出与性相关的特性,与它们的垂直方向有关.
  • 在这些材料中实现受控的垂直方向是一个重大挑战.
  • 这限制了它们在新型光电子应用中的潜力.

研究的目的:

  • 引入一种简单的单步折叠方法,以创造异性异性vdW材料的结构差异.
  • 为了证明这种方法的可行性,使用二硫化 (ReS2) 来证明这种方法的可行性.
  • 为了探索由此产生的依赖于度的现象,用于光电子应用.

主要方法:

  • 二硫化物 (ReS2) 的电化学剥离 (ReS2).
  • 在滴滴造过程中进行单步折叠,以诱导结构差异.
  • 使用原子力显微镜 (AFM),凯尔文探针力显微镜 (KPFM),极化光学显微镜,角度分辨光发光和拉曼光谱学的表征.

主要成果:

  • 折叠方法成功地在ReS2片中创建了明显的垂直方向.
  • 虽然结构和电子特性保持相似,但光学特征揭示了显著的性现象.
  • 在折叠的ReS2区域中证实了相反的垂直方向.
  • 观察了依赖于度的拉曼光谱和光电流.

结论:

  • 拟议的折叠技术提供了一种可行的策略,用于设计异构型VDW材料的垂直方向.
  • 观察到的依赖于度的光学和电子反应为与度相关的光电子设备开辟了道路.
  • 这项工作突出了利用VDW材料结构来实现高级功能的潜力.