On the intercalation of CO molecules in ultra-high vacuum conditions underneath graphene epitaxially grown on metal substrates

被引：6
作者：
Politano, Antonio [1 ]
Chiarello, Gennaro [1 ,2 ]
机构：
[1] Univ Calabria, Dipartmento Fis, I-87036 Arcavacata Di Rende, Cs, Italy
[2] Consorzio Nazl Interuniv Sci Fis Mat, I-00146 Rome, Italy
来源：
CARBON | 2013年 / 62卷
关键词：
SURFACE PHONON-DISPERSION; GRAPHITE MONOLAYER; FREESTANDING GRAPHENE; KOHN ANOMALIES; CHEMICAL-REACTIONS; SUBSURFACE SITES; GAS MOLECULES; NI(111); ADSORPTION; OXYGEN;
D O I：
10.1016/j.carbon.2013.06.013
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 have studied the interaction of CO with epitaxial graphene on Pt(111) and Ru(0001) by means of high-resolution electron energy loss spectroscopy measurements. Our experiments unambiguously demonstrate that in ultra-high vacuum conditions CO does not intercalate underneath the graphene monolayer supported on Pt(111) and Ru(0001). For submonolayer coverages of graphene on Pt(111), CO adsorption occurs only in Pt on-top sites while bridge sites, usually populated on the clean Pt(111) surface, are inhibited. Instead, we find that epitaxial graphene is rather reactive toward water molecules. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：263 / 269
页数：7
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