Universität zu Köln

Will, Moritz, Bampoulis, Pantelis ORCID: 0000-0002-2347-5223, Hartl, Tobias, Valerius, Philipp and Michely, Thomas (2019). Conformal Embedding of Cluster Superlattices with Carbon. ACS Appl. Mater. Interfaces, 11 (43). S. 40524 - 40533. WASHINGTON: AMER CHEMICAL SOC. ISSN 1944-8252

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Abstract

Iridium cluster superlattices on the graphene moire with Ir(111) are embedded with elemental carbon through vapor-phase deposition. Using scanning tunneling microscopy and spectroscopy, we find that carbon embedding is conformal and does not deteriorate the excellent order of the iridium clusters. The thermal and mechanical stability of the embedded clusters is greatly enhanced. Smoluchowski ripening as well as cluster pick-up by the scanning tunneling microscopy tip are both suppressed. The only cluster decay path left takes place at an elevated temperature of around 1050 K. The cluster material penetrates through the graphene sheet, whereby it becomes bound to the underlying metal. It is argued that conformal carbon embedding is an important step towards the formation of a new type of sintering-resistant cluster lattice material for nanocatalysis and nanomagnetism.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Will, Moritz UNSPECIFIED UNSPECIFIED UNSPECIFIED Bampoulis, Pantelis UNSPECIFIED orcid.org/0000-0002-2347-5223 UNSPECIFIED Hartl, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Valerius, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Michely, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-130117
DOI:	10.1021/acsami.9b14616
Journal or Publication Title:	ACS Appl. Mater. Interfaces
Volume:	11
Number:	43
Page Range:	S. 40524 - 40533
Date:	2019
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1944-8252
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PARTICLE-SIZE DISTRIBUTIONS; GRAPHENE; CATALYSTS; CO; NANOPARTICLES; REACTIVITY; ARRAYS; ADSORPTION; SURFACES; TRANSITION Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13011