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関連する概念動画

Electromotive Force02:36

Electromotive Force

27.3K
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled  that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc  with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one...
27.3K
Force and Potential Energy in One Dimension01:13

Force and Potential Energy in One Dimension

5.7K
Force can be calculated from the expression for potential energy, which is a function of position. The component of a conservative force, in a particular direction, equals the negative of the derivative of the corresponding potential energy with respect to the displacement in that direction. For regions where potential energy changes rapidly with displacement, the work done and force is maximum. Also, when force is applied along the positive coordinate axis, the potential energy decreases with...
5.7K
Mechanical Protein Functions01:58

Mechanical Protein Functions

5.1K
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
5.1K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.1K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.1K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

21.6K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.6K

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関連する実験動画

Updated: Sep 29, 2025

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
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OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

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単分子金属化における力とエネルギーの定量化

Karl Rothe1, Nicolas Néel1, Marie-Laure Bocquet2

  • 1Institut für Physik, Technische Universität Ilmenau, D-98693 Ilmenau, Germany.

Journal of the American Chemical Society
|March 24, 2022
PubMed
まとめ

研究者は原子力顕微鏡を使って 銀の原子がフタロシアン分子に 伝わるエネルギーを測定しました この実験データと密度関数理論の計算を比較して 引き寄せ力を理解した.

科学分野:

  • 表面科学
  • 原子力顕微鏡
  • コンピュータ化学

背景:

  • フタロシアニン分子は分子電子学において重要である.
  • ナノスケールの操作には 原子-分子相互作用を理解することが重要です
  • シルバー表面は,表面科学の研究において一般的な基板である.

研究 の 目的:

  • 銀原子が自由塩基のフタロシアニン分子に移行する誘導相互作用エネルギーを実験的に決定する.
  • 密度関数理論を用いた理論的計算と実験結果を比較する.
  • 探査機とサンプルのインターフェイスでの自発的な原子移転のエネルギープロファイルを調査する.

主な方法:

  • 原子力顕微鏡 (AFM) を使用して原子移転を検出する.
  • 単一の自由塩基のフタロシアニン分子を銀の表面に吸収する.
  • 密度関数理論 (DFT) をNudged-Elastic-Band (NEB) メソッドを用いて理論的な計算を行う.

主要な成果:

  • 実験的に,AFM探査機からフタロシアニン分子への銀原子の自発的な移転に関連するエネルギーを決定した.
  • DFT-NEB計算で原子移転プロセスの詳細なエネルギープロファイルを取得しました.

さらに関連する動画

Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers
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Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers

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Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy
11:13

Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy

Published on: August 20, 2018

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関連する実験動画

Last Updated: Sep 29, 2025

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
08:34

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

6.8K
Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers
10:08

Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers

Published on: July 25, 2012

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Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy
11:13

Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy

Published on: August 20, 2018

11.2K
  • 実験と理論の相互作用エネルギーの量的な比較を確立した.

    • 結論:

    • この研究は,分子レベルでの原子移転の理論的モデルの実験的検証を提供します.
    • 原子と分子の相互作用を制御する 引き寄せの力についての洞察を得ました
    • この研究は,表面の精密な原子操作に必要な基本的な理解に貢献します.