Surfactant-Assisted Isolation of Small-Diameter Boron-Nitride Nanotubes for Molding One-Dimensional van der Waals Heterostructures
Surfactant-Assisted Isolation of Small-Diameter Boron-Nitride Nanotubes for Molding One-Dimensional van der Waals Heterostructures
复制标题
DOI：
10.1021/acsnano.2c06067
复制
发表时间：
2022-10-04
期刊：
影响因子：
17.1
通讯作者：
Miyata, Yasumitsu
中科院分区：
文献类型：
--
作者：
Furusawa, Shinpei;Nakanishi, Yusuke;Miyata, Yasumitsu
将二维（2D）材料轧制成1D纳米管可以实现更大的功能。氮化硼纳米管（BNNTs）可以作为绝缘的一维模板，用于同轴生长客体纳米管，而不干扰性能表征。然而，它们作为一维模板的应用受到了很大的阻碍，因为它们的可折叠性差，不可避免地导致形成厚束。在这里，我们提出了通过表面活性剂分散体和基于BNNT的一维货车德瓦耳斯异质结构的合成的分散良好的BNNT模板的简易制备。全面的显微镜分析显示分离出干净、高质量的BNNT。统计分析表明，小直径的双壁BNNT高度富集BN侧壁通过超声处理过程中的化学剥离。我们进一步证明，孤立的BNNT可以模板碳和二硫化钼纳米管的同轴生长，通过使用化学气相沉积。本策略可以应用于各种纳米管的合成，从而允许它们的表征。
Rolling two-dimensional (2D) materials into 1D nanotubes allows for greater functionality. Boron-nitride nanotubes (BNNTs) can serve as insulating 1D templates for the coaxial growth of guest nanotubes, without interfering with property characterization. However, their application as 1D templates has been greatly hindered by their poor dispersibility, inevitably resulting in the formation of thick bundles. Here we present the facile preparation of well-dispersed BNNT templates via surfactant dispersions and synthesis of 1D van der Waals heterostructures based on the BNNTs. Comprehensive microscopic analyses show the isolation of clean, high quality BNNTs. Statistical analyses revealed that small-diameter double-walled BNNTs are highly enriched by chemical peeling of BN sidewalls through the sonication process. We further demonstrate that the isolated BNNTs can template the coaxial growth of carbon and MoS2 nanotubes by using chemical vapor deposition. The present strategy can be applied to the synthesis of a variety of nanotubes, thereby allowing for their characterization.