Submolecular-scale Investigations on metal-phthalocyanine monolayers by frequency modulation atomic force microscopy

被引：9

作者：

Ichii, Takashi ^{[1
]}

Fukuma, Takeshi ^{[1
]}

Yoda, Tadashi ^{[1
]}

Kobayashi, Kei ^{[2
]}

Matsushige, Kazumi ^{[1
]}

Yamada, Hirofumi ^{[1
]}

机构：

[1] Kyoto Univ, Dept Elect & Engn, Nishikyo Ku, Kyoto 6158510, Japan

[2] Kyoto Univ, Innovat Collaborat Ctr, Nishikyo Ku, Kyoto 6158520, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 02期

基金：

日本学术振兴会;

关键词：

atomic force microscopy; electric moments; monolayers; organic compounds; SCANNING-TUNNELING-MICROSCOPY; THIN-FILM TRANSISTORS; COPPER PHTHALOCYANINE; SURFACE; TOPOGRAPHY; RESOLUTION; INTERFACE; AU(111); GOLD;

D O I：

10.1063/1.3284094

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Copper-phthalocyanine (CuPc) monolayers and cobalt-phthalocyanine monolayers deposited on Au(111) surfaces were investigated by frequency modulation atomic force microscopy (FM-AFM). Submolecular-resolution topographic images were successfully obtained for both samples. Despite the similar molecular geometry of the two molecules, they showed clearly different contrasts in the topographic images. The origin of the contrast is discussed in terms of the relationship of the molecular orbitals and the chemical interaction between the tip and the molecules. In addition, a molecular-resolution surface potential (SP) image was obtained on CuPc monolayers using Kelvin probe force microscopy (KFM) utilizing FM-AFM. The molecular-scale SP contrast was explained by the electric dipole moment at the organic/metal interface. This result suggested the possibility of the detection of the single molecular dipole moment by KFM.

引用

页数：5

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