Universität zu Köln

Granas, Elin ORCID: 0000-0001-5247-7589, Knudsen, Jan, Schroeder, Ulrike A., Gerber, Timm, Busse, Carsten ORCID: 0000-0001-5522-0578, Arman, Mohammad A., Schulte, Karina, Andersen, Jesper N. and Michely, Thomas (2012). Oxygen Intercalation under Graphene on Ir(111): Energetics, Kinetics, and the Role of Graphene Edges. ACS Nano, 6 (11). S. 9951 - 9964. WASHINGTON: AMER CHEMICAL SOC. ISSN 1936-086X

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Abstract

Using X-ray photoemission spectroscopy (XPS) and scanning tunneling microscopy (STM) we resolve the temperature-, time-, and flake size-dependent intercalation phases of oxygen underneath graphene on Ir(111) formed upon exposure to molecular oxygen. Through the applied pressure of molecular oxygen the atomic oxygen created on the bare Ir terraces is driven underneath graphene flakes. The importance of substrate steps and of the unbinding of graphene flake edges from the substrate for the intercalation Is Identified. With the use of CO titration to selectively remove oxygen from the bare Ir terraces the energetics of intercalation is uncovered. Cluster decoration techniques are used as an efficient tool to visualize Intercalation processes in real space.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Granas, Elin UNSPECIFIED orcid.org/0000-0001-5247-7589 UNSPECIFIED Knudsen, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Schroeder, Ulrike A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gerber, Timm UNSPECIFIED UNSPECIFIED UNSPECIFIED Busse, Carsten UNSPECIFIED orcid.org/0000-0001-5522-0578 UNSPECIFIED Arman, Mohammad A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schulte, Karina UNSPECIFIED UNSPECIFIED UNSPECIFIED Andersen, Jesper N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Michely, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-479282
DOI:	10.1021/nn303548z
Journal or Publication Title:	ACS Nano
Volume:	6
Number:	11
Page Range:	S. 9951 - 9964
Date:	2012
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1936-086X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OXIDATION; MECHANISM; O-2 Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47928