Transport, magnetic and vibrational properties of chemically exfoliated few-layer graphene
Márkus BG, Simon F, Chacón-Torres JC, Reich S, Szirmai P, Náfrádi B, Forró L, Pichler T, Vecera P, Hauke F, Hirsch A (2015)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2015
Journal
Book Volume: 252
Pages Range: 2438-2443
Journal Issue: 11
Abstract
Abstractauthoren We study the vibrational, magnetic and transport properties of Few Layer Graphene (FLG) using Raman and electron spin resonance spectroscopy and microwave conductivity measurements. FLG samples were produced using wet chemical exfoliation with different post-processing, namely ultrasound treatment, shear mixing, and magnetic stirring. Raman spectroscopy shows a low intensity D mode which attests a high sample quality. The G mode is present at 1580 cm-1 as expected for graphene. The 2D mode consists of 2 components with varying intensities among the different samples. This is assigned to the presence of single and few layer graphene in the samples. Electron Spin Resonance (ESR) spectroscopy shows a main line in all types of materials with a width of about 1 mT and a g-factor in the range of 2.005-2.010. Paramagnetic defect centers with a uniaxial g-factor anisotropy are identified, which shows that these are related to the local sp2 bonds of the material. All kinds of investigated FLGs have a temperature dependent resistance which is compatible with a small gap semiconductor. The difference in resistance is related to the different grain size of the samples. © 2015 WILEY-VCH Verlag GmbH
Authors with CRIS profile
Philipp Vecera
Lehrstuhl für Organische Chemie II
Frank Hauke
Zentralinstitut für Neue Materialien und Prozesstechnik
Andreas Hirsch
Lehrstuhl für Organische Chemie II
Involved external institutions
Budapest University of Technology and Economics (BME) / Budapesti Műszaki és Gazdaságtudományi Egyetem
Hungary (HU)
Freie Universität Berlin
Germany (DE)
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Switzerland (CH)
Universität Wien / University of Vienna
Austria (AT)
Hungary (HU)
Freie Universität Berlin
Germany (DE)
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Switzerland (CH)
Universität Wien / University of Vienna
Austria (AT)
How to cite
APA:
Márkus, B.G., Simon, F., Chacón-Torres, J.C., Reich, S., Szirmai, P., Náfrádi, B.,... Hirsch, A. (2015). Transport, magnetic and vibrational properties of chemically exfoliated few-layer graphene. physica status solidi (b), 252(11), 2438-2443. https://doi.org/10.1002/pssb.201552296
MLA:
Márkus, Bence G., et al. "Transport, magnetic and vibrational properties of chemically exfoliated few-layer graphene." physica status solidi (b) 252.11 (2015): 2438-2443.
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