超分子ネットワークと共性有機フレームワークの間の電気場媒介の可逆変換
Zhen-Feng Cai1, Gaolei Zhan1, Lakshya Daukiya1
1Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium.
Journal of the American Chemical Society
|July 9, 2019
まとめ
オリエンテッド電場は,液体/固体界面でのボロン酸の凝縮を正確に制御します. これは,スキャニングトンネル顕微鏡を用いて分子ネットワークと共性有機フレームワーク間の可逆的な切り替えを可能にします.
科学分野:
- 表面科学
- 材料科学
- ナノテクノロジー
背景:
- ボロン酸は,インターフェースで自己組織化できる.
- ボロン酸の組立を制御することは 先進的な材料を作るために不可欠です
- 分子アセンブリを制御する既存の方法は,精度と範囲に制限があります.
研究 の 目的:
- ボロン酸の凝縮を制御するための指向された電場の使用を調査する.
- 自己組み立て分子ネットワークと共性有機フレームワークの間の相移行を調査する.
- 電場による相変換の可逆性を決定する.
主な方法:
- スキャントンネル顕微鏡 (STM) を用いて,電場を向ける.
- 液体/固体インターフェイスに制御された電気バイアスの極性を適用します.
- 結果の分子構造と相変化を観察し分析する.
主要な成果:
- ボロン酸の凝縮を局所的に制御するには,指向された電場を使用した.
- 適用されたバイアスの極性は,分子ネットワークと共性有機フレームワークの間の相移行を決定した.
- 観測された電場誘発の相変換は,環境条件下では逆転可能であった.
結論:
- オリエンテッド電場は インターフェイスで 分子の自己組み立てを操作するための正確な方法を提供します
- 段階転換を逆行的に制御する能力は,ダイナミックな分子材料の可能性を開きます.
- この技術により,共性有機フレームワークと関連するナノ構造の製造が進みます.
関連する概念動画
Network Covalent Solids
16.1K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.1K
Electric Field
12.3K
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...
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...
12.3K
Determining Electric Field From Electric Potential
4.9K
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...
In general, regardless of whether the electric field is uniform, it points in the direction of decreasing potential because the force on a positive...
4.9K
Finding Electric Potential From Electric Field
5.4K
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...
5.4K
Covalent Bonds
160.5K
Overview
160.5K
Electric Field Inside a Conductor
7.3K
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...
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...
7.3K


