ECSTM study of adsorption of C_(60),C_(70),C_(86) and Y@C_(82) on Au(111)  

作　　者：SU GuiJin1,JIA ManKe1,GAN LiHua2 & SHI RuiFang1 1State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China 2School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China 

出　　处：《Science China Chemistry》2010年第8期1705-1710,共6页中国科学（化学英文版）

基　　金：support from the Chinese Academy of Sciences (KZCX2-YW-QN407);the National Natural Science Foundation of China (20807049);the National Basic Research Program of China (2009CB421606);the Project-sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education

摘　　要：The adsorption of a variety of fullerenes (C60,C70,C86,Y@C82) on Au(111) electrode surfaces was comprehensively investigated in 0.1 M HClO4 by electrochemical scanning tunneling microscopy (ECSTM).In the ordered C60's adlayer,C60 molecules formed either (2(1/3) × 2 3～(1/3))or "in-phase" structure.The high resolution STM image shows that the C60 cage is not simply round but shows a bifurcated feature.The adsorption orientation of C60 on Au(111) is tentatively suggested.In the ordered C70's adlayer,the perpendicular fullerene molecules are the main adsorption mode and form (2 3～(1/3) × 2 3～(1/3)) structure.However,for C86 and Y@C82,the ordered adlayer could not be obtained on Au(111) under the present condition.These differences may be due to the different molecular shapes and sizes,and the encapsulated metal atom which affects the lattice matches with the substrate.The adsorption of fullerene molecules on Au(111) from disorder to order could be tuned simply by steering the dimensional sizes or shapes of the fullerenes used.The adsorption of a variety of fullerenes (C60,C70,C86,Y@C82) on Au(111) electrode surfaces was comprehensively investigated in 0.1 M HClO4 by electrochemical scanning tunneling microscopy (ECSTM).In the ordered C60’s adlayer,C60 molecules formed either (2(1/3) × 2 3～(1/3))or 'in-phase' structure.The high resolution STM image shows that the C60 cage is not simply round but shows a bifurcated feature.The adsorption orientation of C60 on Au(111) is tentatively suggested.In the ordered C70’s adlayer,the perpendicular fullerene molecules are the main adsorption mode and form (2 3～(1/3) × 2 3～(1/3)) structure.However,for C86 and Y@C82,the ordered adlayer could not be obtained on Au(111) under the present condition.These differences may be due to the different molecular shapes and sizes,and the encapsulated metal atom which affects the lattice matches with the substrate.The adsorption of fullerene molecules on Au(111) from disorder to order could be tuned simply by steering the dimensional sizes or shapes of the fullerenes used.

关 键 词：C60 C70 C86 Y@C82 ECSTM Au(111) 

分 类 号：O611.3[理学—无机化学]