Universität zu Köln

Petrovic, M., Rakic, I. Srut, Runte, S., Busse, C., Sadowski, J. T., Lazic, P., Pletikosic, I., Pan, Z. -H., Milun, M., Pervan, P., Atodiresei, N., Brako, R., Sokcevic, D., Valla, T., Michely, T. and Kralj, M. (2013). The mechanism of caesium intercalation of graphene. Nat. Commun., 4. LONDON: NATURE PUBLISHING GROUP. ISSN 2041-1723

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Abstract

Properties of many layered materials, including copper- and iron-based superconductors, topological insulators, graphite and epitaxial graphene, can be manipulated by the inclusion of different atomic and molecular species between the layers via a process known as intercalation. For example, intercalation in graphite can lead to superconductivity and is crucial in the working cycle of modern batteries and supercapacitors. Intercalation involves complex diffusion processes along and across the layers; however, the microscopic mechanisms and dynamics of these processes are not well understood. Here we report on a novel mechanism for intercalation and entrapment of alkali atoms under epitaxial graphene. We find that the intercalation is adjusted by the van der Waals interaction, with the dynamics governed by defects anchored to graphene wrinkles. Our findings are relevant for the future design and application of graphene-based nano-structures. Similar mechanisms can also have a role for intercalation of layered materials.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Petrovic, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rakic, I. Srut UNSPECIFIED UNSPECIFIED UNSPECIFIED Runte, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Busse, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sadowski, J. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lazic, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pletikosic, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pan, Z. -H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Milun, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pervan, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Atodiresei, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brako, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sokcevic, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Valla, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Michely, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kralj, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-472432
DOI:	10.1038/ncomms3772
Journal or Publication Title:	Nat. Commun.
Volume:	4
Date:	2013
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2041-1723
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language METAL-SURFACES; GRAPHITE; SUPERCONDUCTIVITY; IR(111); IRIDIUM; CARBON; FILMS Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47243