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

Frictional Force01:07

Frictional Force

When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
Static and Kinetic Frictional Force01:05

Static and Kinetic Frictional Force

One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
Dry Friction01:30

Dry Friction

Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
Kinetic Friction01:26

Kinetic Friction

Consider a truck trying to pull a stationary car. As the truck exerts a force on the car, static friction is created at the point of contact between the two surfaces. This frictional force resists the car's movement and keeps it at rest. However, when the applied force by the truck surpasses the limiting static frictional force, an interesting phenomenon occurs. The frictional force at the interface reduces to a lower value, known as the kinetic frictional force. At this point, the car begins...
Frictional Forces on Flat Belts01:28

Frictional Forces on Flat Belts

Flat belts are commonly used in various industrial applications for transmitting power from one pulley to another. When a flat belt is wrapped around a set of pulleys, it experiences different tensions at the driving pulley ends due to the friction between the belt and pulley surface. When the pulley moves in a counterclockwise direction, the tension T2 on the opposite side of the pulley where the belt is moving away from is higher than the tension T1 on the side where the belt is moving...
Rolling Resistance01:21

Rolling Resistance

When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...

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

Benchmarking cancer outcomes in Europe: a scoping review of methodologies and case-mix adjustments.

ESMO real world data and digital oncology·2026
Same author

Gonorrhœal Peritonitis.

The Chicago medical journal and examiner·2023
Same author

Evolocumab is initiated in Central and Eastern Europe at Much Higher LDL-C Levels than Recommended in Guidelines: Results from the Observational HEYMANS Study.

European cardiology·2023
Same author

The persistence of seroprotective levels of antibodies after vaccination with PreHevbrio, a 3-antigen hepatitis B vaccine.

Vaccine·2023
Same author

Performance of a cryo-cooled crystal monochromator illuminated by hard X-rays with MHz repetition rate at the European X-ray Free-Electron Laser.

Optics express·2022
Same author

Dense, single-phase, hard, and stress-free Ti<sub>0.32</sub>Al<sub>0.63</sub>W<sub>0.05</sub>N films grown by magnetron sputtering with dramatically reduced energy consumption.

Scientific reports·2022

関連する実験動画

Updated: Jun 19, 2026

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis
10:38

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis

Published on: September 3, 2013

固体における脱位による表面ダイナミクス

S Kodambaka1, S V Khare, W Swiech

  • 1Frederick Seitz Materials Research Laboratory and the Department of Materials Science, University of Illinois, 104 South Goodwin Avenue, Urbana, Illinois 61801, USA. kodambak@uiuc.edu

Nature
|May 7, 2004
PubMed
まとめ
この要約は機械生成です。

表面の変位は,ポイント・デフェクト・ミグレーションによるチタン・ニトリド (TiN) 表面の渦巻き段階の成長を誘導する. 外部ストレスなしで観察されるこの現象は,変位媒介による表面粗化とナノ構造の安定性に関する新しい洞察を明らかにします.

さらに関連する動画

Functional Surface-immobilization of Genes Using Multistep Strand Displacement Lithography
11:05

Functional Surface-immobilization of Genes Using Multistep Strand Displacement Lithography

Published on: October 25, 2018

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

関連する実験動画

Last Updated: Jun 19, 2026

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis
10:38

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis

Published on: September 3, 2013

Functional Surface-immobilization of Genes Using Multistep Strand Displacement Lithography
11:05

Functional Surface-immobilization of Genes Using Multistep Strand Displacement Lithography

Published on: October 25, 2018

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

科学分野:

  • マテリアルサイエンス 材料科学
  • 表面科学とは,地表科学である.
  • 固体物理 固体物理学

背景:

  • 変位は,結晶固体の線形欠陥であり,材料の性質に影響を与える.
  • 表面端の変位は,ナノ構造の安定性,機械的,化学的プロセスに影響を与えます.
  • 表面の動態と進化に起因する変位の影響に関する理解は限られている.

研究 の 目的:

  • 表面終結変位のほぼ均衡のダイナミクスを調査する.
  • 表面形態学的進化における変位の役割を理解する.
  • 表面におけるナノ構造の安定性を制御するメカニズムを探求する.

主な方法:

  • 低エネルギー電子顕微鏡 (LEEM) を利用し,リアルタイムで観測した.
  • タイタン窒化物 (TiN) の (111) 表面に終結する変位を研究した.
  • 施された外部のストレスや純質量変化の欠如で観測される現象.

主要な成果:

  • 熱的に駆動された核形成と,脱位核の周りのスパイラルステップの成長が観察されました.
  • 恒定で温度に依存する角速度で渦巻きのステップの形状保全成長が実証されています.
  • スパイラルステップ形成は,ボルトから表面への変位線に沿った点欠陥移動に起因する.

結論:

  • 表面終結変位は,重要な表面動力学と形態学的進化を誘導することができます.
  • 脱位媒介による表面粗化は,堆積や蒸発がない場合でも発生します.
  • 発見は,ナノ構造の安定性を支配するメカニズムに関する基本的な洞察を提供します.