統合されたポリマーネットワークを持つ超拡張性,自己治癒性マクロモレキュラー結晶

Ling Zhang¹, Jake B Bailey¹, Rohit H Subramanian¹

¹Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA.

Nature

|May 4, 2018

まとめ

研究者らは構造的整合性を保ちながら大きく膨らむことができる新種のマクロモレキュラーフェリチン結晶を作り出しましたこれらの柔軟な結晶は自己修復性を持ち先進的な材料に新たな道を開きます

科学分野:

材料科学
クリスタルグラフィー
バイオ物理学

背景:

凝縮された物質の形成は通常,構造的秩序と柔軟性の間のトレードオフを伴う.
生物学的および合成の組み立ては高い秩序と柔軟性が共存しユニークな機械的性質を提供することを示しています
既存の柔軟な結晶は結合ネットワークの制約によって制限され,脆性や破裂につながる.

研究の目的:

伝統的な柔軟な結晶の限界を克服する新しい結晶材料を開発する.
ハイドロゲルポリマーと統合されたマクロ分子フェリチン結晶の構造的および機械的性質を調査する.
これらの高度な結晶材料の自己治癒能力と潜在的な応用を探求する.

主な方法:

ハイドロゲルポリマーとマクロ分子フェリチン結晶の統合
複合結晶の同位体膨張と収縮を誘導する
高解像度技術を用いて構造的整合性,周期的順序,分子相互作用を分析する.
自己修復効率と機械的特性を評価する.

主要な成果:

マクロ分子フェリチン結晶は,周期的順序を維持し,その寸法180%,体積の500%以上まで同位体的に膨張した.
特定の分子接触は格子収縮時に再構成され原子レベルの周期性を回復します
複合結晶は効率的な自己治癒を示し,ダイナミックな水素ゲル-フェリチン相互作用による断片化に抵抗しました.
単一結晶の中で化学的に,そして機械的に分化された領域が作られました.

結論:

フェリチン・ヒドロゲル複合結晶は柔軟な結晶材料における画期的な進歩であり前例のない膨張と自己治癒を示しています
これらの材料は従来の結晶の硬さの限界を克服し,破裂することなく重要な構造変化を可能にします.
分子接触と自己治癒の能力はダイナミックで弾性のある材料を様々な用途に活用する可能性を示唆しています

さらに関連する動画

11:20

Automated Protocols for Macromolecular Crystallization at the MRC Laboratory of Molecular Biology

Published on: January 24, 2018

17.0K

07:14

In situ Photo-rheology Monitors Viscoelastic Changes in Photo-responsive Polymer Networks

Published on: June 20, 2025

935

関連する概念動画

02:34

Polymers

41.1K

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...

Polymers

Ionic Crystal Structures

17.5K

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...

17.5K

02:26

Protein Networks

4.6K

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...

4.6K

01:25

Crystal Growth: Principles of Crystallization

5.1K

Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...

5.1K

02:18

Network Covalent Solids

16.2K

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...