Universität zu Köln

Herbig, Charlotte, Ahlgren, E. Harriet, Jolie, Wouter, Busse, Carsten ORCID: 0000-0001-5522-0578, Kotakoski, Jani ORCID: 0000-0002-1301-5266, Krasheninnikov, Arkady V. ORCID: 0000-0003-0074-7588 and Michely, Thomas (2014). Interfacial Carbon Nanoplatelet Formation by Ion Irradiation of Graphene on Iridium(111). ACS Nano, 8 (12). S. 12208 - 12219. WASHINGTON: AMER CHEMICAL SOC. ISSN 1936-086X

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Abstract

We expose epitaxial graphene (Gr) on Ir(111) to low-energy noble gas ion irradiation and investigate by scanning tunneling microscopy and atomistic simulations the behavior of C atoms detached from Gr due to ion impacts. Consistent with our density functional theory calculations, upon annealing Gr nanoplatelets nucleate at the Gr/Ir(111) interface from trapped C atoms initially displaced with momentum toward the substrate. Making use of the nanoplatelet formation phenomenon, we measure the trapping yield as a function of ion energy and species and compare the values to those obtained using molecular dynamics simulations. Thereby, complementary to the sputtering yield, the trapping yield is established as a quantity characterizing the response of supported 2D materials to ion exposure. Our findings shed light on the microscopic mechanisms of defect production in supported 2D materials under ion irradiation and pave the way toward precise control of such systems by ion beam engineering.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Herbig, Charlotte UNSPECIFIED UNSPECIFIED UNSPECIFIED Ahlgren, E. Harriet UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, Wouter UNSPECIFIED UNSPECIFIED UNSPECIFIED Busse, Carsten UNSPECIFIED orcid.org/0000-0001-5522-0578 UNSPECIFIED Kotakoski, Jani UNSPECIFIED orcid.org/0000-0002-1301-5266 UNSPECIFIED Krasheninnikov, Arkady V. UNSPECIFIED orcid.org/0000-0003-0074-7588 UNSPECIFIED Michely, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-421239
DOI:	10.1021/nn503874n
Journal or Publication Title:	ACS Nano
Volume:	8
Number:	12
Page Range:	S. 12208 - 12219
Date:	2014
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1936-086X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TOTAL-ENERGY CALCULATIONS; SEMICONDUCTORS; INTERCALATION; IMPACTS; ATOMS Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/42123