Growth mechanism of metallofullerenes

金属富勒烯的生长机理

• 批准号: 18550022
• 负责人: ACHIBA Yohji
• 金额: $ 2.74万
• 依托单位: Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18550022/
• 关键词: Metallofullerenes; carbon nanostructure; fullerene; carbon nanotube; cap structure; metal encapsulation; fullerene network; precursor of nanostructure; 成長モデル; フェナレニル; 5・6ネットワーク; フラーレン成長機構; 金属内包化モデル

Fullerenes, metallofullerenes and carbon nanotubes have been known to consist of a curved carbon network with nano meter sizes. Among these carbon nanomaterials, fullerene and metallofullerenes consist of pentagons and hexagons, but carbon nanotubes consist of mostly only curved hexagons. Howeve4 looking at very carefully the tip of the carbon nanotubes, we see the presence of a fullerene cap structure consisting of 6 pentagons and hexagons. The numbers of hexagons for this caPP much depend of the sin of the diameter of carbon nanotubes i.e., the carbon nanotube with larger diameter has the larger diameter cap structure. One of the most important and common issues which has not been clarified yet is growth process of these nano carbon materials. In the present work we intended to clarify the mechanism of growth process by constructing a model which commonly describe the growth processes of these three kinds of carbon nano materials and to investigate the model on the basis of experimental evidences. For this purpose, we first made a model in which the formation of a fullerene cap structure consisting of 6 pentagons and hexagons commonly takes place at the initial growth stage. Then, the model has been examined by several kinds of experimental evidences such as characterization of carbon nano materials produced under the different experimental conditions. Experimental results clearly showed that the size of fullerene cap structure was significantly influenced by temperature under which the carbon nano structures grew up.

富勒烯、金属富勒烯和碳纳米管由纳米尺寸的弯曲碳网络组成。在这些碳纳米材料中，富勒烯和金属富勒烯由五边形和六边形组成，而碳纳米管大多由弯曲的六边形组成。然而，仔细观察碳纳米管的尖端，我们可以看到一个由6个五边形和六边形组成的富勒烯帽结构。碳纳米管的六边形数与碳纳米管直径的大小有关，即直径越大的碳纳米管具有更大的直径帽结构。这些纳米碳材料的生长过程是目前尚未明确的一个重要问题。本文试图通过构建一个描述这三种碳纳米材料生长过程的通用模型来阐明生长过程的机理，并在实验证据的基础上对该模型进行研究。为此，我们首先建立了一个模型，在这个模型中，富勒烯帽结构通常在生长初期形成，由6个五边形和6个六边形组成。然后，通过不同实验条件下制备的碳纳米材料的表征等实验证据对该模型进行了检验。实验结果清楚地表明，碳纳米结构生长的温度对富勒烯帽结构的尺寸有显著影响。

项目成果

A growth model and the production of single walled carbon nanotubes with a single chirality

具有单一手性的单壁碳纳米管的生长模型和生产

• 发表时间: 2007
• 作者: B. Concina;S. Tomita;N. Takahashi;T. Kodama;S. Suzuki;K. Kikuchi;Y. Achiba;A. Gromov;J. U. Andersen;P. Hvelplund;Shiozawa他16名;Concina他9名;阿知波 洋次;Y.Acbiba(Invited);Y.Achiba(Plenary);Y.Achiba(invited)
• 通讯作者: Y.Achiba(invited)

Raman spectroscopy of size-selected linear plyyne Molecules C2nH2(n=4-6)encapsulated in single-wall carbon nanotubes

单壁碳纳米管封装的尺寸选定的线性聚炔分子 C2nH2(n=4-6) 的拉曼光谱

• 发表时间: 2007
• 期刊: J.Phys.Chem 111
• 作者: D.Nishide;et. al.
• 通讯作者: et. al.

Towazds a production of SWNTs with a single chiral distribution

致力于生产具有单一手性分布的单壁碳纳米管

• 发表时间: 2007
• 作者: B. Concina;S. Tomita;N. Takahashi;T. Kodama;S. Suzuki;K. Kikuchi;Y. Achiba;A. Gromov;J. U. Andersen;P. Hvelplund;Shiozawa他16名;Concina他9名;阿知波 洋次;Y.Acbiba(Invited)
• 通讯作者: Y.Acbiba(Invited)

Formation of single-wall carbon nanotubes in Ar and nitrogen gas atmosphere by using laser furnace technique

激光炉技术在氩气和氮气气氛中形成单壁碳纳米管

• 发表时间: 2007
• 期刊: Eur.Phys.J.D 43
• 作者: S.Suzuki;et. al.
• 通讯作者: et. al.

Photoemission and inverse photoemission study of the electronic sturcture of C60 fullerenes encapsulated in single-wall carbon nanotubes

单壁碳纳米管封装的C60富勒烯电子结构的光电发射和反光电发射研究

• 发表时间: 2006
• 期刊: Phys.Rev., B 73
• 作者: H.Shiozawa;et. al.
• 通讯作者: et. al.