The use of sample positioning to control defect creation by oxygen plasma in isotopically labelled bilayer graphene membranes

Guerra, Valentino Libero Pio; Valeš, Václav; Mikšátko, Jiří; Plšek, Jan; Drogowska-Horna, Karolina A.; Volochanskyi, Oleksandr; Kalbáč, Martin

doi:https://dx.doi.org/10.1039/d1ra01249e

Number of the records: 1

The use of sample positioning to control defect creation by oxygen plasma in isotopically labelled bilayer graphene membranes

1.

SYSNO ASEP	0541683
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	The use of sample positioning to control defect creation by oxygen plasma in isotopically labelled bilayer graphene membranes
Author(s)	Guerra, Valentino Libero Pio (UFCH-W)_{ORCID, RID, SAI} Valeš, Václav (UFCH-W)_{RID, ORCID} Mikšátko, Jiří (UFCH-W) Plšek, Jan (UFCH-W)_{RID, ORCID} Drogowska-Horna, Karolina A. (UFCH-W) Volochanskyi, Oleksandr (UFCH-W)_{ORCID, SAI} Kalbáč, Martin (UFCH-W)_{RID, ORCID}
Source Title	RSC Advances. - : Royal Society of Chemistry Roč. 11, č. 17 (2021), s. 10316-10322
Number of pages	7 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	graphene membranes ; oxygen plasma ; Raman spectroscopy
Subject RIV	CF - Physical ; Theoretical Chemistry
OECD category	Physical chemistry
R&D Projects	GX20-08633X GA ČR - Czech Science Foundation (CSF)
	EF16_026/0008382 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	UFCH-W - RVO:61388955
UT WOS	000629707400056
EID SCOPUS	85102727646
DOI	10.1039/d1ra01249e
Annotation	Monolayer and isotopically labelled bilayer graphene membranes were prepared on grids for transmission electron microscopy (TEM). In order to create defects in the graphene layers in a controlled way, we studied the sensitivity of the individual graphene layers to the oxygen plasma treatment. We tested samples with different configurations by varying the order of the transfer of layers and changing the orientation of the samples with respect to the plasma chamber. Using Raman spectroscopy, HRTEM and X-ray photoelectron spectroscopy, we demonstrated defect formation and determined the quantity and chemical composition of the defects. By keeping the sample structure and the setup of the experiment unchanged, the significant role of the sample orientation with respect to the chamber was demonstrated. The effect was accounted for by the variation of the accessibility of the sample surface for the reactive species. Therefore, this effect can be used to control the degree of damage in each layer, resulting in differing numbers of defects present on each side of the sample.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2022
Electronic address	http://hdl.handle.net/11104/0319213

Number of the records: 1