Functional Group-Selective Adsorption Using Scanning Tunneling Microscopy

被引：5

作者：

Min, Young Hwan ^{[2
]}

Park, Eun Hee ^{[2
]}

Kim, Do Hwan ^{[1
]}

Kim, Sehun ^{[2
]}

机构：

[1] Daegu Univ, Div Sci Educ, Gyeongbuk 712714, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Mol Level Interface Res Ctr, Taejon 305701, South Korea

来源：

ACS NANO | 2012年 / 6卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

STM; bifunctional molecule; selective adsorption; tunneling electron; tungsten oxide; catalysis; SINGLE-MOLECULE; SEMICONDUCTOR SURFACES; ATOMIC-SCALE; CHEMISTRY; GE(100); INTERFACE; MOTION; ACID; TIP; STM;

D O I：

10.1021/nn300686y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, we selectively enhanced two types of adsorption of 3-mercaptoisobutyric acid on a Ge(100) surface by using the tunneling electrons from an STM and the catalytic effect of an STM tip. 3-Mercaptoisobutyric acid has two functional groups: a carboxylic add group at one end of the molecule and a thiol group at the other end. It was found that the adsorption occurring through the carboxylic acid group was selectively enhanced by the application of electrons tunneling between an STM tip and the surface. Using this enhancement, it was possible to make thiol group-terminated surfaces at any desired location. In addition, via the use of a tungsten STM tip coated with a tungsten oxide (WO3) layer, we selectively catalyzed the adsorption through the thiol group. Using this catalysis, it was possible to generate carboxylic acid group-terminated surfaces at any desired location. This functional group-selective adsorption using STM could be applied in positive lithographic methods to produce semiconductor substrates terminated by desired functional groups.

引用

页码：3597 / 3603

页数：7

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