Multiple heteroatom substitution to graphene nanoribbon.

Multiple heteroatom substitution to graphene nanoribbon.
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DOI:
10.1126/sciadv.aar7181
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发表时间:
2018-04
期刊:
影响因子:
13.6
通讯作者:
Foster AS
Foster AS
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kawai S;Nakatsuka S;Hatakeyama T;Pawlak R;Meier T;Tracey J;Meyer E;Foster AS

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高分辨率原子力显微镜可以分辨B、C和N原子之间的差异。将杂原子取代到纳米结构的石墨烯元素(例如石墨烯纳米带)中为电子性质的原子工程提供了可能性。为了表征这些取代,功能化原子力显微镜(AFM)-一种直接解析化学结构的工具-是最有前途的工具之一,但杂原子的化学分析很少进行。我们合成了多个杂原子取代的石墨烯纳米带,并表明AFM可以直接解决元素的差异,并可以与货车德瓦尔斯半径,以及调制的局部电子密度所造成的取代。这种元素敏感的测量在功能化二维碳材料的分析中迈出了重要的一步。
High-resolution atomic force microscopy can resolve the difference among B, C, and N atoms. Substituting heteroatoms into nanostructured graphene elements, such as graphene nanoribbons, offers the possibility for atomic engineering of electronic properties. To characterize these substitutions, functionalized atomic force microscopy (AFM)—a tool to directly resolve chemical structures—is one of the most promising tools, yet the chemical analysis of heteroatoms has been rarely performed. We synthesized multiple heteroatom-substituted graphene nanoribbons and showed that AFM can directly resolve elemental differences and can be correlated to the van der Waals radii, as well as the modulated local electron density caused by the substitution. This elemental-sensitive measurement takes an important step in the analysis of functionalized two-dimensional carbon materials.
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