Richard E. Smalley Institute for Nanoscale Science and Technology, Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas, 77005, USA.
ACS Nano. 2011 Feb 22;5(2):968-74. doi: 10.1021/nn102326c. Epub 2011 Jan 4.
Here we demonstrate that graphene nanoribbons (GNRs) free of oxidized surfaces can be prepared in large batches and 100% yield by splitting multiwalled carbon nanotubes (MWCNTs) with potassium vapor. If desired, exfoliation is attainable in a subsequent step using chlorosulfonic acid. The low-defect density of these GNRs is indicated by their electrical conductivity, comparable to that of graphene derived from mechanically exfoliated graphite. The possible origins of directionally selective splitting of MWCNTs have been explored using computer modeling, and plausible explanations for the unique role of potassium were found.
在这里，我们证明了通过用钾蒸汽分裂多壁碳纳米管（MWCNTs）可以大量且 100%地制备出无氧化表面的石墨烯纳米带（GNRs）。如果需要，使用氯磺酸可以在后续步骤中实现剥离。这些 GNRs 的低缺陷密度由其电导率表明，与机械剥离石墨得到的石墨烯相当。通过计算机建模探索了 MWCNTs 定向选择性分裂的可能起源，并找到了钾的独特作用的合理解释。
