Transport, magnetic and vibrational properties of chemically exfoliated few-layer graphene

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Márkus BG, Simon F, Chacón-Torres JC, Reich S, Szirmai P, Náfrádi B, Forró L, Pichler T, Vecera P, Hauke F, Hirsch A
Zeitschrift: physica status solidi (b)
Jahr der Veröffentlichung: 2015
Band: 252
Heftnummer: 11
Seitenbereich: 2438-2443
ISSN: 0370-1972
eISSN: 1521-3951
Sprache: Englisch


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

FAU-Autoren / FAU-Herausgeber

Hauke, Frank Dr.
Zentralinstitut für Neue Materialien und Prozesstechnik
Hirsch, Andreas Prof. Dr.
Lehrstuhl für Organische Chemie II
Vecera, Philipp
Lehrstuhl für Organische Chemie II

Autor(en) der externen Einrichtung(en)
Budapest University of Technology and Economics (BME) / Budapesti Műszaki és Gazdaságtudományi Egyetem
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Freie Universität Berlin
Universität Wien / University of Vienna


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.

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.


Zuletzt aktualisiert 2019-17-05 um 07:38