A Bottom-Up Approach to Solution-Processed, Atomically Precise Graphitic Cylinders on Graphite
A Bottom-Up Approach to Solution-Processed, Atomically Precise Graphitic Cylinders on Graphite
复制标题
DOI：
10.1021/acs.nanolett.8b03979
复制
发表时间：
2018-12-01
期刊：
影响因子：
10.8
通讯作者：
Jasti, Ramesh
中科院分区：
文献类型：
--
作者：
Leonhardt, Erik J.;Van Raden, Jeff M.;Jasti, Ramesh
延伸的碳纳米结构，例如碳纳米管（CNT），表现出卓越的性能，但难以均匀合成。在此，我们提出了一类新型碳纳米材料，它是通过圆柱形、原子级精确的小分子自下而上的自组装而构建的。在超分子设计原理和圆堆积理论的指导下，我们设计并合成了一种氟化纳米环，它在固态下自组装成通道直径精确到1.63 nm的纳米管状阵列。然后使用温和的溶液铸造技术通过外延生长在高度有序的热解石墨（HOPG）表面上构建这些阵列的垂直“森林”。此外，我们还表明，纳米环的基本特性荧光很容易转移到体相，这意味着这些材料的特性可以通过纳米环构建块的精确功能化直接改变。该策略预计将在开发具有富g空腔（类似于碳纳米管）的新型石墨纳米材料方面具有更广泛的应用。
Extended carbon nanostructures, such as carbon nanotubes (CNTs), exhibit remarkable properties but are difficult to synthesize uniformly. Herein, we present a new class of carbon nanomaterials constructed via the bottom up self-assembly of cylindrical, atomically precise small molecules. Guided by supramolecular design principles and circle packing theory, we have designed and synthesized a fluorinated nanohoop that, in the solid state, self-assembles into nanotube-like arrays with channel diameters of precisely 1.63 nm. A mild solution-casting technique is then used to construct vertical "forests" of these arrays on a highly ordered pyrolytic graphite (HOPG) surface through epitaxial growth. Furthermore, we show that a basic property of nanohoops, fluorescence, is readily transferred to the bulk phase, implying that the properties of these materials can be directly altered via precise functionalization of their nanohoop building blocks. The strategy presented is expected to have broader applications in the development of new graphitic nanomaterials with g-rich cavities reminiscent of CNTs.