Chemisorption of Ethanol on Ge(100) Surface

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Chemical reaction of ethanol (CH3CH2OH) with Ge(100) surface has been investigated using scanning tunneling microscopy (STM) observation and density functional theory (DFT) calculations. At low coverage, high resolution STM images showed that ethanol dissociatively adsorbed on a single Ge dimer. The adsorption features included bright protrusions assigned to Ge-OCH2CH3 structure formed via O-H dissociation of ethanol. Real-time STM observations revealed that the molecular chain of ethanol increased gradually via successive adsorption along the dimer row direction following increased exposure to ethanol. DFT calculation results showed that the adsorption of ethanol on Ge(100) was dominated by kinetic control at room temperature. Thus, an integrated study of experimental and theoretical approaches coherently confirmed that ethanol reacts with Ge(100) via O-H dissociative adsorption and the final structure has the H-Ge-Ge- OCH2CH3 geometry on a single dimer of Ge(100).
Publisher
AMER CHEMICAL SOC
Issue Date
2018-07
Language
English
Article Type
Article
Keywords

SCANNING TUNNELING MICROSCOPE; AUGMENTED-WAVE METHOD; SEMICONDUCTOR SURFACES; ORGANIC-MOLECULES; X-1 SURFACE; ADSORPTION; CHEMISTRY; SILICON; METHANOL; SI(100)

Citation

JOURNAL OF PHYSICAL CHEMISTRY C, v.122, no.27, pp.15352 - 15358

ISSN
1932-7447
DOI
10.1021/acs.jpcc.8b02973
URI
http://hdl.handle.net/10203/244843
Appears in Collection
CH-Journal Papers(저널논문)
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