Scanning tunneling microscopy investigation of copper phthalocyanine and truxenone derivative binary superstructures on graphite.
The binary self-assembly of copper phthalocyanine (CuPc) and 2,3,7,8,12,13-hexahexyloxy-truxenone (TrO23) at the solid/liquid interface of highly oriented pyrolytic graphite (HOPG) was investigated by using scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). Pseduohexagonal and linear patterned superstructures of CuPc are obtained by co-adsorbing with TrO23. High-resolution STM images reveal the structural details of the arrangement of TrO23 and CuPc in the binary assembly structures. The molecular ratio between CuPc and TrO23 in the adlayer can be modulated by the CuPc concentration in liquid phase. The electronic properties of CuPc and TrO23 in the co-adsorbed self-assembly are investigated by STS. The results presented here are helpful to the design and fabrication of multi-component functional molecular nanostructures.
Institute of Chemistry, the Chinese Academy of Sciences (CAS) and Beijing National Laboratory for Molecular Sciences, Beijing 100190, China.
Jia
J
Liu
Dong
D
Wang
Jie-Yu
JY
Wang
Jian
J
Pei
Li-Jun
LJ
Wan