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関連する概念動画

Bonding in Metals02:32

Bonding in Metals

52.6K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
52.6K
Metallic Solids02:37

Metallic Solids

20.8K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.8K
Alkali Metals03:06

Alkali Metals

24.9K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
24.9K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.4K
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...
24.4K
Properties of Transition Metals02:58

Properties of Transition Metals

30.0K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
30.0K
Dimensional Analysis03:40

Dimensional Analysis

65.0K
Dimensional analysis, also known as the factor label method, is a versatile approach for mathematical operations. The main principle behind this approach is: the units of quantities must be subjected to the same mathematical operations as their associated numbers. This method can be applied to computations ranging from simple unit conversions to more complex and multi-step calculations involving several different quantities and their units.
Conversion Factors and Dimensional Analysis
The unit...
65.0K

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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

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金属のない3次元ペロブスキート鉄電器

Heng-Yun Ye1, Yuan-Yuan Tang1, Peng-Fei Li1

  • 1Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P.R. China.

Science (New York, N.Y.)
|July 14, 2018
PubMed
まとめ

研究者は金属のない有機ペロブスキート・フェロエレクトリックを発見した. 優れた材料であるMDABCO-アモニアトライオイドは 柔軟な電子機器やソフトロボットに適した性質を備えています

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Flash Infrared Annealing for Perovskite Solar Cell Processing
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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科学分野:

  • 材料科学
  • 固体物理学
  • 有機化学

背景:

  • 非有機ペロブスキットの電鉄は電子機器に不可欠ですが,柔軟性は欠けている.
  • オーガニック・フェロエレクトリックは 柔軟性があり 環境に優しい加工ですが 希少です
  • 新しい有機フェロエレクトリックの発見は 次世代の応用に不可欠です

研究 の 目的:

  • 新しい無金属の有機ペロブスキート・フェロエレクトリックを特定し,特徴づけること.
  • 柔軟で高度な電子アプリケーションに適した性質を持つ材料を探求する.
  • オーガニック・ペロブスキット・フェロエレクトリックの不足を 解決するためです

主な方法:

  • 金属のない有機ペロブスキート化合物の合成
  • X線微分法やその他の技術を用いた構造的特徴化.
  • 自発的偏極化と相変化温度を含む鉄電性能的測定.

主要な成果:

  • 3D構造を持つ金属のない有機ペロブスキットの新しいファミリーが特定されました.
  • MDABCO-アモニウムトリヨイドは高自発的偏化 (22 μC/cm2) とキュリー温度 (448 K) を示した.
  • この材料は8つの異なる極化方向を示し, 多様な用途を提供しています.

結論:

  • 金属のない有機ペロブスキットは,フェロ電気用途のための有望な材料のクラスです.
  • MDABCO-アンモニアトライオイドの特性により,柔軟な電子機器,ソフトロボット,および生物医学機器に最適です.
  • この発見は,先進的で柔軟な鉄電性材料を設計するための新しい道を開きます.