Adsorption of heterobifunctional 4-nitrophenol on the Ge(100)-2 x 1 surface

被引：2

作者：

Shong, Bonggeun ^{[1
,2
]}

Hellstern, Thomas R. ^{[1
]}

Bent, Stacey F. ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem Engn, 443 Via Ortega, Stanford, CA 94305 USA

[2] Chungnam Natl Univ, Dept Chem, 99 Daehak Ro, Daejeon 34134, South Korea

来源：

SURFACE SCIENCE | 2016年 / 650卷

基金：

美国国家科学基金会;

关键词：

Germanium; Organic functionalization; Chemisorption; Bifunctional adsorption; Heterobifunctional; MOLECULAR LAYER DEPOSITION; SELECTIVE FUNCTIONALIZATION; BIFUNCTIONAL MOLECULES; SI(100) SURFACE; CHEMISTRY; NITROBENZENE; OXIDE; INTERFACE; SPECTRA; LINKAGE;

D O I：

10.1016/j.susc.2015.04.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the adsorption chemistry of a heterobifunctional molecule, 4-nitrophenol, on the Ge(100)-2 x 1 surface. X-ray photoelectron and infrared spectroscopy experiments and density functional theory calculations were used to determine the adsorption products. The results show that 4-nitrophenol reacts with the Ge surface through either one or both of the -OH or -NO2 functionalities. It was found that the fraction of dually and singly tethered adsorbates varies according to reaction conditions: namely, singly tethered adsorbates are favored at higher adsorbate coverages and lower adsorption temperatures. These variations are explained by a two-step adsorption mechanism for 4-nitrophenol, in which geometrical limitations of the adsorbates on the surface affect the product distribution. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：279 / 284

页数：6

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