Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Network Covalent Solids02:18

Network Covalent Solids

16.4K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.4K
Predicting Reaction Outcomes02:24

Predicting Reaction Outcomes

11.2K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
11.2K
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

41
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
41
Catalysis02:50

Catalysis

31.4K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
31.4K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Kit Ligand enhances in vitro oocyte maturation and early embryonic development in sheep.

Animal reproduction science·2026
Same author

Automated High-Throughput Virtual Screening of Catalysts via Templated Organic Reaction Pathway Construction: A Case Study on Suzuki-Miyaura Coupling Reaction.

Journal of the American Chemical Society·2026
Same author

Survival Comparison of Proximal and Total Gastrectomy after Neoadjuvant Therapy in Siewert Type II/III Gastric Adenocarcinoma: A Real-World Multicenter Cohort Study.

Annals of surgical oncology·2026
Same author

Anisotropic Amorphization of Black Titania.

Journal of the American Chemical Society·2026
Same author

Case Report: Where is the boundary between autosomal recessive early-onset Parkinson's disease and dystonia-parkinsonism: a case of PLA2G6-associated neurodegeneration.

Frontiers in human neuroscience·2026
Same author

Linear-Scaling and Memory-Efficient Implementation of van-der-Waals Interaction (DFT-D3) for Large Systems.

Journal of chemical theory and computation·2026
Same journal

A Ni-Mediated Cross-Coupling Approach to Deuterated <sup>18</sup>F- Fluoromethylated (Hetero)arenes.

Journal of the American Chemical Society·2026
Same journal

Efficient Light-Driven CO<sub>2</sub> Capture and Reversible Release Enabled by Metastable Photoacid-Decorated Metal-Organic Frameworks.

Journal of the American Chemical Society·2026
Same journal

In Situ Raman Spectroscopy Reveals the Dynamic Evolution and Ethanol Dependence of SEI Structure in Li-Mediated N<sub>2</sub> Reduction Reaction.

Journal of the American Chemical Society·2026
Same journal

Solvent Esterification and Stoichiometric Control in Ambient-Grown FAPbI<sub>3</sub> Single-Crystal Solar Cells.

Journal of the American Chemical Society·2026
Same journal

Unlocking Azulene Functionalization via Strain-Induced Azulyne Intermediates.

Journal of the American Chemical Society·2026
Same journal

An Oxazine-Locked Covalent Organic Framework by a Tandem Pinner/Schiff Base Reaction for Hydrogen Peroxide Photosynthesis.

Journal of the American Chemical Society·2026
関連記事をすべて見る

関連する実験動画

Updated: Mar 7, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

19.3K

グラファイトからダイヤモンド:運動選択性の起源

Yao-Ping Xie1,2, Xiao-Jie Zhang1, Zhi-Pan Liu1

  • 1Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Key Laboratory of Computational Physical Science, Department of Chemistry, Fudan University , Shanghai 200433, China.

Journal of the American Chemical Society
|February 8, 2017
PubMed
まとめ
この要約は機械生成です。

グラファイトは 軽度の圧縮で立方形のダイヤモンドではなく 六角形のダイヤモンドに変身します この驚くべき選択性は,六角形のダイヤモンドの形成とより速い運動を促進する新しい原子レベルの構造によって説明されます.

さらに関連する動画

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
13:09

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

15.4K
Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
09:13

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

14.2K

関連する実験動画

Last Updated: Mar 7, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

19.3K
Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
13:09

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

15.4K
Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
09:13

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

14.2K

科学分野:

  • 材料科学
  • 固体物理学
  • クリスタルグラフィー

背景:

  • 静的圧縮下での石墨の固体相移行は立方体ダイヤモンドに対して熱力学的に好ましい.
  • しかし,実験的な観察は,穏やかな条件 (15 GPa) でさえ,六角形のダイヤモンド形成を好むことを示しています.

研究 の 目的:

  • 石墨からダイヤモンドへの相変化の運動を制御する原子レベルのメカニズムを解明する.
  • 軽度の静的圧縮下での立方体ダイヤモンドよりも六角形のダイヤモンドの形成を説明する.

主な方法:

  • 低エネルギー中間構造を特定するための潜在エネルギー表面のグローバル探査.
  • 石墨とダイヤモンドの移行経路の定量運動分析

主要な成果:

  • 7種類の低エネルギーの中間構造を特定し,移行運動学に不可欠である.
  • 六角形のダイヤモンドは,一貫したグラファイト/六角形のダイヤモンドのインターフェイスにより,グラファイトマトリックス内で容易な核化を示す.
  • 六角形のダイヤモンドの伝播運動は立方形のダイヤモンドよりも著しく速い.

結論:

  • 六角形のダイヤモンドの観察された選択性は,熱力学的に駆動されるのではなく,運動的に制御される.
  • 一貫したインターフェースは,六角形のダイヤモンドの急速な核形成と成長を促進します.
  • 立方形のダイヤモンドの形成は,一貫した核形成部位が欠如しているため,著しく遅いもので,しばしば六角形のダイヤモンドの成長と混在する.