Incorporation of nitrogen in carbon nanotubes

Droppa R.; Hammer P.; Carvalho ACM.; dos Sanots MC.; Alvarez F.

首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Incorporation of nitrogen in carbon nanotubes

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Incorporation of nitrogen in carbon nanotubes

机译：在碳纳米管中掺入氮

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Nitrogen-doped carbon nanotubes were obtained by the are-discharge technique in a helium-nitrogen atmosphere and using iron-nickel-cobalt catalysts. The samples were analyzed using spectroscopic techniques (Raman, EELS, Xray photoelectron spectroscopy) and transmission electron microscopy (TEM). Pure helium atmosphere conditions led to bundles of single-wall nanotubes with diameters of similar to1.5 nm. The presence of nitrogen during tube formation produced irregular and thickly textured tubes. TEM micrographs showed that N suppresses the formation of bundles of single-wall nanotubes, giving rise to nested nanofibers. Quantum-chemical calculations were carried out to study the influence of substitutional N on the tube conformation. The calculations show that the combination of hexagons and pentagons at low N concentration produces kinks that account for the irregular shaped nanotubcs. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 22]

机译：氮掺杂的碳纳米管是通过在氦-氮气氛中使用等离子放电技术并使用铁-镍-钴催化剂获得的。使用光谱技术（拉曼，EELS，X射线光电子能谱）和透射电子显微镜（TEM）对样品进行分析。纯氦气氛条件导致直径接近1.5 nm的单壁纳米管束。管子形成过程中存在的氮气会产生不规则且粗大的管子。 TEM显微照片显示，N抑制了单壁纳米管束的形成，从而产生了嵌套的纳米纤维。进行了量子化学计算以研究取代氮对试管构象的影响。计算表明，在低氮浓度下，六边形和五边形的组合产生了导致不规则形状纳米管的扭结。（C）2002 Elsevier Science B.V.保留所有权利。 [参考：22]

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《Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites》 |2002年第2期|共6页
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Droppa R.; Hammer P.; Carvalho ACM.; dos Sanots MC.; Alvarez F.;
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Incorporation of nitrogen in carbon nanotubes

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