Universität zu Köln

Martinez-Galera, Antonio J., Brihuega, Ivan ORCID: 0000-0001-5032-9304 and Gomez-Rodriguez, Jose M. (2015). Influence of the Rotational Domain in the Growth of Transition Metal Clusters on Graphene. J. Phys. Chem. C, 119 (7). S. 3572 - 3579. WASHINGTON: AMER CHEMICAL SOC. ISSN 1932-7455

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Abstract

The influence of the relative orientation between graphene monolayers and the underlying substrate on the growth of transition metal clusters over epitaxial graphene on Ir(111) surfaces is investigated by scanning tunneling microscopy (STM) in ultrahigh vacuum (UHV). This experimental study has been carried out for W and Ir clusters and, in both cases, the results revealed the existence of noticeable differences in the size and distribution of the clusters formed over areas where graphene and substrate lattices are aligned with respect to those grown on regions where both lattices present a relative rotation angle. In particular, while over aligned domains, in a consistent way with previous findings, the formation of ordered arrays of monodisperse clusters exhibiting a great structural perfection is observed, on the rotated ones it takes place the formation of larger size isolated clusters scattered around the surface. Moreover, the boundaries between different rotational domains are found to be decorated by these larger clusters. This disparity observed in the growth of clusters is explained in terms of the differences in the graphenesubstrate interaction existing on aligned and rotated domains.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Martinez-Galera, Antonio J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brihuega, Ivan UNSPECIFIED orcid.org/0000-0001-5032-9304 UNSPECIFIED Gomez-Rodriguez, Jose M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-412245
DOI:	10.1021/jp511652f
Journal or Publication Title:	J. Phys. Chem. C
Volume:	119
Number:	7
Page Range:	S. 3572 - 3579
Date:	2015
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1932-7455
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SCANNING-TUNNELING-MICROSCOPY; NANOPARTICLES; SURFACES Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41224