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通过化学气相沉积法在一种典型的高指数面铜(410)-氧上制备出了一维石墨烯超晶格,并利用拉曼光谱(Raman)、低能电子衍射(LEED)、扫描隧道显微术(STM)等方法研究了氢原子在该超晶格上的吸附.实验结果揭示了由于超晶格的调制作用所引起的无缺陷石墨烯区域的选择性吸附,氢原子优先吸附在石墨烯超晶格一维周期中的相同部位.这一发现为进一步通过一维超晶格调控石墨烯的性质提供了更多可能.在石墨烯上的吸附氢原子除了单个或成对存在之外,实验还首次观察到一种新的三氢原子位型.
A one-dimensional graphene superlattice was prepared by chemical vapor deposition on a typical high index copper (410) -oxygen. The Raman, LEED, (STM) and other methods to study the adsorption of hydrogen atoms on the superlattice.The experimental results reveal that due to the superlattice modulation caused by the selective adsorption of non-defective graphene region, hydrogen atoms preferentially adsorbed on the graphite The same sites in the one-dimensional period of the olefin superlattice.This finding offers more possibilities for further controlling the properties of the graphene by means of one-dimensional superlattices.The adsorbed hydrogen atoms on the graphene, except in single or in pairs For the first time, a new triatomic hydrogen atom was observed in the experiment.