Počet záznamů: 1
Stress and charge transfer in uniaxially strained CVD graphene
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SYSNO ASEP 0460797 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stress and charge transfer in uniaxially strained CVD graphene Tvůrce(i) Bouša, Milan (UFCH-W) RID, ORCID
Anagnostopoulos, G. C. (GR)
del Corro, Elena (UFCH-W)
Drogowska, Karolina (UFCH-W) RID
Pekárek, J. (CZ)
Kalbáč, Martin (UFCH-W) RID, ORCID
Parthenios, J. (GR)
Papagelis, K. (GR)
Galiotis, C. (GR)
Frank, Otakar (UFCH-W) RID, ORCIDZdroj.dok. Physica Status Solidi B : Basic Solid State Physics. - : Wiley - ISSN 0370-1972
Roč. 253, č. 12 (2016), s. 2355-2361Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova chemical vapour deposition ; graphene ; Raman spectroscopy Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GA14-15357S GA ČR - Grantová agentura ČR LL1301 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000390339000011 EID SCOPUS 84978426232 DOI 10.1002/pssb.201600233 Anotace Mechanical properties of graphene prepared by chemical vapour deposition (CVD) are not easily comparable to the properties of nearly perfect graphene prepared by mechanical cleavage. In this work, we attempt to investigate the mechanical performance of CVD graphene (simply supported or embedded in polymer matrix), transferred by two different techniques, under uniaxial loading with simultaneous in situ monitoring by Raman microspectroscopy. The level of charge transfer doping and strain is assessed using the vector analysis modified for uniaxial strain. The strain distribution across the samples varies significantly, owing to the growth and transfer process, which induces wrinkles and faults in the CVD graphene. In simply supported specimens, the stress transfer efficiency is generally very low and the changes in Raman spectra are dominated by variations in the charge transfer originating from the realignment of the domains on the substrate upon the application of strain. In contrast, samples covered with an additional polymer layer exhibit an improved stress transfer efficiency, and the alterations of charge doping levels are negligible. In fully embedded specimens, the variations in stress transfer efficiencies are caused by the size of the effective graphene domains defined by cracks, folds and/or wrinkles. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2017
Počet záznamů: 1