Počet záznamů: 1

Stress and charge transfer in uniaxially strained CVD graphene

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, ORCID}
Zdroj.dok.	Physica Status Solidi B : Basic Solid State Physics. - : Wiley - ISSN 0370-1972 Roč. 253, č. 12 (2016), s. 2355-2361
Poč.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