Real-time observation of graphene oxidation on Pt(111) by low-energy electron microscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333684" target="_blank" >RIV/00216208:11320/16:10333684 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.susc.2015.08.042" target="_blank" >http://dx.doi.org/10.1016/j.susc.2015.08.042</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.susc.2015.08.042" target="_blank" >10.1016/j.susc.2015.08.042</a>

Result language

angličtina

Original language name

Real-time observation of graphene oxidation on Pt(111) by low-energy electron microscopy

Original language description

A monolayer of graphene was prepared by thermal decomposition of ethylene gas on Pt(111). The graphene can be readily removed by dosing O-2 at pressures in 10(-8) mbar range and surface temperatures (T-s) near 1000 K. Residual gas analysis during the oxygen treatment of graphene layer detected CO to be the only formed product. The oxidation process has been continuously imaged by Low-energy Electron Microscope (LEEM) operated in mirror-electron mode. LEEM observations revealed that the oxidation of graphene on Pt(111) occurs simultaneously at the outer island perimeter and in the interior of the graphene island. Symmetric hexagonal pits were observed to form continuously within graphene sheets, the pits proceeded isotropically. The etch rate was determined to be equal for both modes and independent of the surface environment with the exception of areas above Pt step edges. The pit growth rate at constant oxygen pressure was found to increase exponentially with respect to temperature over the investigated T-s range of 927-1014K, yielding an apparent activation energy of 479 kJ/mol. (C) 2015 Published by Elsevier B.V.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Surface Science

ISSN

0039-6028

e-ISSN

—

Volume of the periodical

644

Issue of the periodical within the volume

Feb

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

5

Pages from-to

165-169

UT code for WoS article

000367489000025

EID of the result in the Scopus database

2-s2.0-84949625331