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Temperature-induced strain release via rugae on the nanometer and micrometer scale in graphene monolayer
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SYSNO ASEP 0476774 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Temperature-induced strain release via rugae on the nanometer and micrometer scale in graphene monolayer Author(s) Verhagen, Timotheus (FZU-D) ORCID
Valeš, Václav (UFCH-W) RID, ORCID
Frank, Otakar (UFCH-W) RID, ORCID
Kalbáč, Martin (UFCH-W) RID, ORCID
Vejpravová, Jana (FZU-D) RID, ORCIDNumber of authors 5 Source Title Carbon. - : Elsevier - ISSN 0008-6223
Roč. 119, Aug (2017), s. 483-491Number of pages 9 s. Language eng - English Country US - United States Keywords graphene ; wrinkle ; low temperature Raman mapping ; strain ; doping ; thermal expansion Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Subject RIV - cooperation J. Heyrovsky Institute of Physical Chemistry - Physical ; Theoretical Chemistry R&D Projects GA15-01953S GA ČR - Czech Science Foundation (CSF) LL1301 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 ; UFCH-W - RVO:61388955 UT WOS 000402713300058 EID SCOPUS 85018760030 DOI 10.1016/j.carbon.2017.04.041 Annotation Wrinkles are one possible rugae phase that can be observed in two-dimensional crystals. Those topographic features, with dimensions ranging from nanometers to micrometers, can be identified in single-layer graphene transferred onto various substrates. When the temperature of the sample is varied, the different thermal expansion coefficients of graphene and its supporting substrate lead to reconstruction of the graphene's topography, which results in spatially inhomogeneous strain and doping. Using Raman spectral mapping, we investigated in situ the temperature dependence (50-300 K) of topographic features in a graphene monolayer grown by chemical vapor deposition (CVD) and transferred onto a Si/SiO2 substrate. We find that the temperature-induced strain follows the temperature variation of the cubic lattice parameter of the Si substrate. Furthermore, the temperature-induced strain has an unambiguous relation to the topographic reconstruction of the graphene monolayer. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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