Ru(0001)上的9,9′-二亚呫吨分子吸附行为和石墨烯摩尔超结构  

Adsorption behavior of 9,9’-Dixanthylidene and moirésuperstructure on Ru(0001)

作　　者：黄德饶 宋俊杰 何丕模[1] 黄凯凯[1] 张寒洁[1] Huang De-Rao;Song Jun-Jie;He Pi-Mo;Huang Kai-Kai;Zhang Han-Jie(School of Physics,Zhejiang University,Hangzhou 310058,China;Department of Fundamental and Social Science,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China)

机构地区：[1]浙江大学物理学院,杭州310058 [2]浙江水利水电学院基础教学部,杭州310018

出　　处：《物理学报》2022年第21期254-262,共9页Acta Physica Sinica

摘　　要：研究9,9′-二亚呫吨分子在Ru(0001)上的吸附行为,在室温下通过扫描隧道电子显微镜观察石墨烯的自下而上制备过程.在亚单层体系中,9,9′-二亚呫吨分子随机吸附在Ru(0001)上,简单分析了其空间结构;并以9,9′-二亚呫吨分子为前体,在Ru(0001)衬底上自下而上制备石墨烯,在超高真空中对Ru(0001)衬底进行长时间退火后,首次发现其具有3种不同旋转角(6.3°,13.9°和16.1°)的摩尔超结构,迄今为止未见报道,并通过构建模型分析这3种摩尔超结构的形成机制.本实验为丰富Ru(0001)上摩尔超结构多样性作出了贡献,同时也对以石墨烯/Ru(0001)为基的科学研究打下基础.This paper reports the adsorption behavior of the 9,9’-Dixanthylidene on Ru(0001),the bottom-up fabrication of graphene is also investigated through a scanning tunneling microscope(STM).We analyze the spatial structure of 9,9’-Dixanthylidene molecules which are randomly dispersed on a Ru(0001)substrate in the sub-monolayer coverage.Then we bottom-up fabricate the graphene on the Ru(0001)substrate with the 9,9’-Dixanthylidene molecules as the precursor.Three kinds of moirésuperstructures with different rotation angles(6.3°,13.9°,and 16.1°)are found after implementing high temperature annealing in ultrahigh vacuum.This result provides data support for the study of moirésuperstructures on Ru(0001)substrate and lays a solid foundation for further scientific research based on graphene/Ru(0001).

关 键 词：9 9′-二亚呫吨 石墨烯 RU(0001) 扫描隧道显微镜 

分 类 号：O647.3[理学—物理化学] TQ127.11[理学—化学]