Scanning tunneling microscopy of 1, 2, and 3 layers of electroactive compounds

被引：26

作者：

Barlow, D

Scudiero, L

Hipps, KW ^{[1
]}

机构：

[1] Washington State Univ, Dept Chem, Pullman, WA 99164 USA

[2] Washington State Univ, Mat Sci Program, Pullman, WA 99164 USA

来源：

ULTRAMICROSCOPY | 2003年 / 97卷 / 1-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0304-3991(03)00029-9

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Bilayer and trilayer organic films grown on Au(1 1 1) were studied by scanning tunneling microscopy (STM). Studies were carried out under UHV conditions with the sample cooled to either 80 or 100 K. Cobalt(II)phthalocyanine [CoPc] was deposited from vapor onto Au(1 1 1), followed by vanadyl phthalocyanine, VOPc. CoPc coverages studied were 0.5 and 1 monolayer, while VOPc coverages were about 0.5 monolayer. Constant current images were acquired at high tunneling gap resistance, of the order of 30 GOmega. Two different physical structures were observed for VON on CoPc, and each had a characteristic I(V) curve indicating significantly different unoccupied state density. It is also demonstrated that the transmission factor for two layers of VON is not simply the product of the transmission factors for each layer. (C) 2003 Elsevier Science B.V. All rights reserved.

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页码：47 / 53

页数：7

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