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

Phase Transitions02:31

Phase Transitions

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 occupy...
Phase Transitions01:21

Phase Transitions

A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

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...
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
Phase Diagram01:19

Phase Diagram

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).

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

Optimized SnO<sub>2</sub> Thin Films: Correlating Solution Chemistry and Deposition Conditions with Optoelectronic Properties.

ACS applied materials & interfaces·2026
Same author

Reaction yield oscillates over reaction time in first-order chemical reactions.

RSC advances·2026
Same author

Light- and copper-activated (photo)cytotoxicity of 8-hydroxyquinoline-based boron photosensitizers with lipid droplet targeting and lipid peroxidation accumulation.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Synthesis and Characterization of Kinetically Stabilized Octadehydrobisthieno[12]annulenes.

The Journal of organic chemistry·2025
Same author

Macrocycles composed of biphenylene and butadiyne units with antiaromatic character.

Chemical science·2025
Same author

BOPAM's Bright and Dark Excited States: Insight from Structural, Photophysical, and Quantum Chemical Investigations.

Molecules (Basel, Switzerland)·2025

関連する実験動画

Updated: May 10, 2026

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

2次元の自己組み立てネットワークにおける温度による構造的相変化.

Matthew O Blunt1, Jinne Adisoejoso, Kazukuni Tahara

  • 1Department of Chemistry, Division of Molecular Imaging and Photonics, Laboratory of Photochemistry and Spectroscopy, KU Leuven - University of Leuven, Celestijnenlaan 200 F B2404, B-3001 Leuven, Belgium. m.blunt@ucl.ac.uk

Journal of the American Chemical Society
|July 9, 2013
PubMed
まとめ

研究者は,表面上の自己組織化分子による構造的相変化を研究した. 彼らは,溶媒を考慮することは,多孔性のネットワークを正確にモデル化するために極めて重要であり,2Dセルフアセンブリのための将来の予測モデルに影響を与えることを発見しました.

さらに関連する動画

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

関連する実験動画

Last Updated: May 10, 2026

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

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

科学分野:

  • 超分子化学とは
  • 表面科学とは,地表科学のことである.
  • 熱力学は熱力学である.

背景:

  • 液体-固体界面での二次元 (2D) 超分子自己組み立ては複雑で,しばしば同一の分子構成要素から多様な構造を生み出します.
  • 異なるネットワーク形態の形成を左右する要因を理解することは,自己組み立て制御の鍵です.

研究 の 目的:

  • アルキル化デヒドロベンゾ[12]アヌレン (DBA) デリバティブの密集と多孔性の相間の構造的相変遷を調査する.
  • この移行の熱力学パラメータ (エンタルピーとエントロピー) を決定する.
  • 実験結果をシミュレーションや理論的な計算と比較し,溶媒の役割を強調する.

主な方法:

  • スキャントンネル顕微鏡 (STM) を使って,自己組み立て構造を観察した.
  • 構造段階に対する温度と濃度の影響は,体系的に研究されました.
  • 熱力学モデルを使用してエンタルピーとエントロピーの変化を定量化しました.

主要な成果:

  • DBAデリバティブの密集したフェーズと多孔性のフェーズの間には,明確な構造的フェーズ移行が観察されました.
  • 移行に関連したエンタルピーとエントロピーの変化を成功裏に測定しました.
  • 実験結果は,溶媒効果を組み込んだ場合,理論的な計算と良好な一致を示しました.

結論:

  • この研究は,多孔型自己組み立てネットワークのモデルに溶媒効果を含むことが極めて重要であることを強調しています.
  • 構造的相移行は,2D自己組み立ての熱力学を調査するための強力なアプローチを提供します.
  • これらの発見は,2D超分子自己組み立てのためのより正確な予測モデルを開発するのに役立ちます.