arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.08712cond-mat.mtrl-sci
收藏

模板法直接生长超薄双壁碳纳米管

Templated direct growth of ultra-thin double-walled carbon nanotubes

Lei Shi, Jinquan Wei, Kazuhiro Yanagi, Takeshi Saito, Kecheng Cao, Ute Kaiser, Paola Ayala, Thomas Pichler

摘要:

双壁碳纳米管(DWCNTs)结合了多壁碳纳米管(MW-)和单壁碳纳米管(SW-)的优点,可以通过将前驱体(如富勒烯、二茂铁)转化为以单壁碳纳米管(SWCNTs)为模板的薄的内碳纳米管来获得。然而,这种方法是有限的,因为DWCNT产率受到填充效率(取决于填充分子的类型)、打开和切割SWCNT以及主体SWCNT的直径的强烈影响。因此,它不能应用于所有类型的SWCNT模板。在这里,我们展示了一种通用的路线,通过使单壁碳纳米管在高温下在真空中稳定合成超薄DWCNTs。该方法适用于不同类型的单壁碳纳米管,包括金属性分选的单壁碳纳米管,而不使用任何前体,因为碳源来自重建的单壁碳纳米管和残余碳。所得的DWCNTs具有高质量,且内管的产率与由二茂铁/富勒烯豆荚转化制备的DWCNTs相当或更高。

英文摘要:

Double-walled carbon nanotubes (DWCNTs) combined the advantages of multi-walled (MW-) and single-walled (SW-) CNTs can be obtained by transforming the precursors (e.g. fullerene, ferrocene) into thin inner CNTs inside SWCNTs as templates. However, this method is limited since the DWCNT yield is strongly influenced by the filling efficiency (depending on the type of the filled molecules), opening and cutting the SWCNTs, and the diameter of the host SWCNTs. Therefore, it cannot be applied to all types of SWCNT templates. Here we show a universal route to synthesize ultra-thin DWCNTs via making SWCNTs stable at high temperature in vacuum. This method applies to different types of SWCNTs including metallicity-sorted ones without using any precursors since the carbon sources were from the reconstructed SWCNTs and the residue carbons. The resulting DWCNTs are with high quality and the yield of inner tubes is comparable to/higher than that of the DWCNTs made from the transformation of ferrocene/fullerene peapods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑