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関連する概念動画

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Structures of Solids02:22

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
Metallic Solids02:37

Metallic Solids

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. Many...
Network Covalent Solids02:18

Network Covalent Solids

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...
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

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関連する実験動画

Updated: May 19, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
06:35

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

Published on: February 15, 2016

遠距離オーダーカーボンクラスター:無形な構成要素を持つ結晶性物質.

Lin Wang1, Bingbing Liu, Hui Li

  • 1High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439, USA. lwang@ciw.edu

Science (New York, N.Y.)
|August 21, 2012
PubMed
まとめ

研究者らは,無形炭素クラスターから新しい長距離オーダーされた物質を合成した. この発見は結晶構造と無形構造を橋渡しし,ユニークな性質を持つ超不圧縮材料を生み出します.

さらに関連する動画

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

関連する実験動画

Last Updated: May 19, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
06:35

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

Published on: February 15, 2016

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

科学分野:

  • 材料科学 材料科学とは
  • 固体物理 固体物理学
  • ナノテクノロジー ナノテクノロジー

背景:

  • 固体材料は構造によって分類される:結晶,無形,または準結晶.
  • 結晶と無形構造の原子レベルのハイブリッド化は,実験的に観察されていないままです.

研究 の 目的:

  • アモルフな炭素のクラスターから構築された長距離秩序を持つ新しい材料の発見を報告するために.
  • この新しい材料の合成と性質を調査する.

主な方法:

  • 溶解フラーレンの圧縮による合成.
  • X線微分とラーマン光譜を用いた特徴化.
  • 量子分子ダイナミクスシミュレーションによる分析.

主要な成果:

  • アモルフな炭素のクラスターから,長距離のオーダーされた物質が成功して合成されました.
  • 炭素60のケージは形質化されたが,無傷の溶媒分子は長距離周期性を保持した.
  • 結果として生じる高圧相は,環境条件に対して消火可能であり,超不圧縮性を表している.

結論:

  • この研究は,原子レベルでハイブリッド化された結晶形無形構造の最初の実験的観測を示しています.
  • この新しい素材は,非常に圧縮不可能なもので,ダイヤモンドにインデントを入れることができます.
  • 溶媒分子は,無形炭素構造の長距離秩序を安定させる上で重要な役割を果たします.