関連する実験動画
Updated: Oct 21, 2025

08:05
Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces
Published on: September 9, 2022
2.5K
水-C12E6表面活性物質のインターフェイスで電場が現れる
Rahul Gera1, Huib J Bakker1, Ricardo Franklin-Mergarejo2
1AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
Journal of the American Chemical Society
|September 9, 2021
まとめ
水に表面活性物質 (C12E6) を加えると,水分は大きく強化される.
科学分野:
- 物理化学
- 表面科学
- 材料科学
背景:
- 水と空気との接点は多くの化学的,物理的なプロセスにおいて極めて重要です.
- 表面活性物質は表面の性質を変化させ ミセル形成や分子指向などの現象に影響を与えます
- 先進的な材料やシステムを設計する上で これらの変更を理解することが重要です
研究 の 目的:
- 表面活性剤ヘクサエチレングリコールモノデシルエーテル (C12E6) との水の界面特性を調査する.
- 水の水素結合と分子指向に対するC12E6の影響を明らかにする.
- これらの変更されたインターフェースの潜在的なアプリケーションを探求する.
主な方法:
- ヘテロダイン検出振動総周波数生成 (HD-VSFG) スペクトロスコーピー
- ケルビン探知器の測定値
- 分子ダイナミクス (MD) シミュレーション
主要な成果:
- C12E6の添加は,インターフェース近くの水素結合の強さを高めます.
- インターフェースで水分子の純正の方向転換が観察されました.
- 広いインターフェース (∼3 nm) と有意な電場 (∼1 V/nm) が検出されました.
結論:
- この研究は,C12E6による水の界面行動における重要な変化を明らかにしています.
- 大量の電場を持つ構造的インターフェースが 形成されていることが示されています
- この研究は,新しい電場調節型触媒と光集集システムへの道を切り開きます.
関連する概念動画
Electrostatic Boundary Conditions
669
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
669
Intermolecular Forces
63.9K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
63.9K
Colloids
18.7K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
18.7K
Electrostatic Boundary Conditions in Dielectrics
1.4K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.4K
Induced Electric Dipoles
4.5K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.5K
Electric Field at the Surface of a Conductor
4.9K
Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
In the 19th century, Michael Faraday conducted the famous ice pail experiment to prove that the charges always reside on the surface of a conductor. The experimental set-up consists of a conducting uncharged container mounted on an insulating stand. The outer surface of the container is...
In the 19th century, Michael Faraday conducted the famous ice pail experiment to prove that the charges always reside on the surface of a conductor. The experimental set-up consists of a conducting uncharged container mounted on an insulating stand. The outer surface of the container is...
4.9K

