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Lifting epitaxial graphene by intercalation of alkali metals

DOI: 10.1021/acs.jpcc.9b02442 DOI Help

Authors: Caio C. Silva (Westfalische Wilhelms-Universitat Munster) , Jiaqi Cai (Westfalische Wilhelms-Universitat Munster) , Wouter Jolie (Universität zu Köln) , Daniela Dombrowski (Universität zu Köln) , Ferdinand H. Farwick Zum Hagen (Universität zu Köln) , Antonio J. Martinez-Galera (Universität zu Köln) , Christoph Schlueter (Diamond Light Source) , Tien-Lin Lee (Diamond Light Source) , Carsten Busse (Universitat Siegen; Westfalische Wilhelms-Universitat Munster; Universität zu Köln)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: The Journal Of Physical Chemistry C

State: Published (Approved)
Published: May 2019
Diamond Proposal Number(s): 9012 , 12558

Abstract: We study the effect of alkali metal intercalation (Cs and Li) on the geometry of graphene on Ir(111) using the x-ray standing waves technique. For both alkali metals, the increase in the mean height of the carbon layer does not depend on the lateral structure or the density of the intercalated layer. For Li, full delamination of graphene from the metal substrate is found already for a small amount of intercalant. Even though Lithium lifts graphene to a smaller height, it is much more efficient in ironing out the corrugation of pristine graphene on Ir(111).

Subject Areas: Chemistry, Materials, Physics

Instruments: I09-Surface and Interface Structural Analysis

Discipline Tags:

Surfaces Physics Physical Chemistry Chemistry Material Sciences

Technical Tags:

Diffraction Spectroscopy Low Energy Electron Diffraction (LEED) X-ray Standing Wave (XSW) X-ray Photoelectron Spectroscopy (XPS)