関連する実験動画

Updated: Jul 12, 2026

Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
09:23

Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures

Published on: July 2, 2012

マルチシェルの炭素ナノチューブの構造モデルと成長メカニズム

S Amelinckx, D Bernaerts, X B Zhang

    Science (New York, N.Y.)
    |March 3, 1995
    PubMed
    まとめ

    新しいモデルは,スクロール形のグラフェンシートと円筒形のグラフェンシートの混合物を提案することによって,グラファイトマルチシェルナノチューブの微細構造を説明しています. このモデルは,これらの高度な炭素ナノマテリアルの観察されたキラル角度,格子パターン,およびドーム形成を説明します.

    さらに関連する動画

    Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy08:10

    Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy

    Published on: February 5, 2017

    Novel 3D/VR Interactive Environment for MD Simulations, Visualization and Analysis11:29

    Novel 3D/VR Interactive Environment for MD Simulations, Visualization and Analysis

    Published on: December 18, 2014

    関連する概念動画

    Assembly of Complex Microtubule Structures01:32

    Assembly of Complex Microtubule Structures

    Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
    Structure of Benzene: Kekulé Model01:07

    Structure of Benzene: Kekulé Model

    In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three assertions—formula of benzene is C6H6, all the hydrogens of benzene are equivalent, and each carbon must have four bonds due to its tetravalency.
    He proposed that benzene has a cyclic structure of six carbon atoms attached to one hydrogen atom each, with three alternating pi bonds.
    Structure of Benzene: Molecular Orbital Model01:18

    Structure of Benzene: Molecular Orbital Model

    According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
    Molecular Models02:00

    Molecular Models

    Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
    Carbon Skeletons01:12

    Carbon Skeletons

    Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...
    Anionic Chain-Growth Polymerization: Mechanism01:04

    Anionic Chain-Growth Polymerization: Mechanism

    The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.