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関連する概念動画

Other Unique Bacteria01:18

Other Unique Bacteria

Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic and are commonly found near the...
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

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関連する実験動画

Updated: May 20, 2026

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
14:42

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

超オムニフォビック磁気マイクロテクスチャは,リモートウェッティングコントロールを備えています.

Anton Grigoryev1, Ihor Tokarev, Konstantin G Kornev

  • 1Department of Chemistry and Biomolecular Science, Clarkson University , 8 Clarkson Avenue, Potsdam, New York 13699, United States.

Journal of the American Chemical Society
|July 21, 2012
PubMed
まとめ

科学者は,磁場を使用して表面の濡れる行動に対するリモート制御を実証しました. 特殊な微細構造の表面は,要求に応じて液体を排斥したり引き寄せたりして切り替えることができます.

さらに関連する動画

Laser Micromachining for Polymer Surface Topography Design
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Laser Micromachining for Polymer Surface Topography Design

Published on: September 19, 2025

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

関連する実験動画

Last Updated: May 20, 2026

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
14:42

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

Laser Micromachining for Polymer Surface Topography Design
05:49

Laser Micromachining for Polymer Surface Topography Design

Published on: September 19, 2025

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

科学分野:

  • マテリアルサイエンス 材料科学
  • 表面化学について
  • ナノテクノロジー ナノテクノロジー

背景:

  • 表面の濡れる性質を制御することは,様々な用途において極めて重要です.
  • 既存の方法には,遠隔操作や広範な適用が欠けていることが多い.
  • 微細構造の表面は,調節可能な湿度を提供しますが,堅牢な制御メカニズムが必要です.

研究 の 目的:

  • 濡れる行動の普遍的なリモコンを実証するために.
  • スーパーオムニフォビック状態とオムニフィリック状態の間の切り替え可能な移行を可能にします.
  • 表面の性質を再構成するために外部磁場を利用する.

主な方法:

  • ニッケル (Ni) マイクロネイルを使用して再構成可能なマイクロテクスチャの製造.
  • 様々な液体 (水,表面活性剤の溶液,有機液体) での湿潤の調査.
  • 外部磁場を適用して表面の曲線を変化させ,濡れ転移を誘導する.

主要な成果:

  • Niマイクロネイルの表面は,超オムニフォビックな行動を示し,様々な液体を排斥しました.
  • 磁場パルスの適用により,オムニフィリック状態への移行が誘発された.
  • 磁場を適用した後の表面は,試験したすべての液体で濡れて,可逆性を示した.

結論:

  • 湿潤の普遍的な遠隔制御のための新しい方法が提示されています.
  • 磁場操作による再構成可能なマイクロテクスチャは,表面の相互作用をダイナミックに制御します.
  • この技術は,微流体,防腐,スマートコーティングの分野でも応用が可能です.