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関連する概念動画

Electric Field01:16

Electric Field

12.9K
Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
12.9K
Determining Electric Field From Electric Potential01:12

Determining Electric Field From Electric Potential

5.0K
The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be used to calculate the electric potential difference between any two points. Similarly, if the electric potential is known for various points, then it is possible to calculate the electric field.
In general, regardless of whether the electric field is uniform, it points in the direction of decreasing potential because the force on a positive...
5.0K
Finding Electric Potential From Electric Field01:13

Finding Electric Potential From Electric Field

5.7K
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
5.7K
Electric Field Inside a Conductor01:20

Electric Field Inside a Conductor

7.5K
When a conductor is placed in an external electric field, the free charges in the conductor redistribute and very quickly reach electrostatic equilibrium. The resulting charge distribution and its electric field have many interesting properties, which can be investigated with the help of Gauss's law.
Suppose a piece of metal is placed near a positive charge. The free electrons in the metal are attracted to the external positive charge and migrate freely toward that region. This region then...
7.5K
Electric Field Lines01:25

Electric Field Lines

9.8K
The three-dimensional representation of the electric field of a positive point charge requires tracing the electric field vectors, whose lengths decrease as the square of their distance from the charge and which point away from the charge at each point. This vector field is no doubt challenging to visualize. The visualization of electric fields becomes quickly intractable as the number of charges increases.
The solution to this problem is to use electric field lines, which are not vectors but...
9.8K
Induced Electric Fields01:23

Induced Electric Fields

4.7K
The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, as a battery does not have to be present in a circuit where current is induced, and magnetic fields never do any work on moving charges. The source of the work is in fact an electric field that is induced in the wires. For example, if a stationary conductor is placed in a...
4.7K

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Updated: Feb 15, 2026

Simulation of a Scaled Assembly Process with Collaboration of a Robotic Arm and Monitoring through a Vision System for Quality Control
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電気 場 で 制御 する 自己 組み立て た ナノ スケール の ロボット アーム

Enzo Kopperger1, Jonathan List1, Sushi Madhira2

  • 1Physics Department E14, Technical University Munich, 85748 Garching, Germany.

Science (New York, N.Y.)
|January 20, 2018
PubMed
まとめ

研究者はDNAナノロボットを開発しました 25nmのロボットアームで 400nmまで拡張できます このナノロボットはナノテクノロジーにおける 分子輸送と力の適用に ミリ秒のアクチュエーションを提供します

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Last Updated: Feb 15, 2026

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科学分野:

  • ナノテクノロジー
  • 分子ロボット
  • バイオ物理学

背景:

  • ダイナミックなDNAナノ構造は 先進的なナノロボットにとって不可欠です
  • これらのナノ構造には 迅速で信頼性の高いアクチュエーションメカニズムが必要です

研究 の 目的:

  • 精密に制御可能な ロボットアームで DNAベースの 分子プラットフォームを作成します
  • 分子輸送と力の適用のためのプラットフォームの能力を示すために.

主な方法:

  • 組み込みロボットアームを搭載した 55nm×55nmのDNAプラットフォームの製造
  • 外部からの電場によるアクチュエーション
  • 単対フォースター共振エネルギー伝送 (spFRET) と光顕微鏡による特徴化.

主要な成果:

  • ロボットアームは最初は25nmでしたが 400nmを超えることができます
  • 精密でコンピュータ制御された腕の位置付けはミリ秒で達成されます.
  • 数十ナノメートルの分子/ナノ粒子の電気駆動輸送が実証された.
  • DNA二重溶解のピコニュートン力の適用

結論:

  • 開発されたDNAナノロボットのプラットフォームは,ナノロボットのアプリケーションの迅速かつ正確な制御を可能にします.
  • このプラットフォームは分子操作と力の適用を容易にし,光子とプラズモンのプロセスを制御する可能性があります.