Structural study of monolayer cobalt phthalocyanine adsorbed on graphite

SURFACE SCIENCE

卷:608

Article

Scheffler, M.^1,2  Smykalla, L.³  Baumann, D.¹  Schlegel, R.¹  Haenke, T.¹  Toader, M.³  Buechner, B.^1,2  Hietschold, M.³  Hess, C.¹ 

[1] IFW Dresden, D-01171 Dresden, Germany

[2] Tech Univ Dresden, Inst Festkorperphys, D-01069 Dresden, Germany

[3] Tech Univ Chemnitz, Inst Phys, Solid Surfaces Anal Grp, D-09107 Chemnitz, Germany

关键词: STM;    Cobalt phthalocyanine;    Organic molecule;    Epitaxy;   

DOI  :  10.1016/j.susc.2012.09.017

来源: Elsevier

【 摘 要 】

We present microscopic investigations on the two-dimensional arrangement of cobalt phthalocyanine molecules on a graphite (HOPG) substrate in the low coverage regime. The initial growth and ordering of molecular layers is revealed in high resolution scanning tunneling microscopy (STM). On low coverages single molecules orient mostly along one of the substrate lattice directions, while they form chains at slightly higher coverage. Structures with two different unit cells can be found from the first monolayer on. A theoretical model based on potential energy calculations is presented, which relates the two phases to the driving ordering forces. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free