Tunneling through nanographene stacks -: art. no. 045423

被引:25
作者
Jäckel, F
Watson, MD
Müllen, K
Rabe, JP
机构
[1] Humboldt Univ, Dept Phys, D-12489 Berlin, Germany
[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[3] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA
关键词
D O I
10.1103/PhysRevB.73.045423
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a scanning tunneling microscopy (STM) and spectroscopy (STS) study of a nanographene, hexa-peri-hexabenzocoronene (HBC), in different stacked geometries, covalently bound in cyclophanes or physisorbed in double layers consisting either of HBCs only or of a mixture of HBC and an alkylated disk-type electron acceptor, coronenediimide. Tunneling bias-dependent STM and STS at the solid-liquid interface reveal that the lateral offset between the stacked molecules strongly influences the electron transport through the stacks, which is attributed to different highest occupied and lowest unoccupied molecular orbital splittings in the stacks. The results imply that the control over the stacking in nanographene multilayers or columns can be used to control their electron transport properties.
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页数:6
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