Electric contributions to magnetic force microscopy response from graphene and MoS2 nanosheets


Autoria(s): Li,LH; Chen,Y
Data(s)

07/12/2014

Resumo

Magnetic force microscopy (MFM) signals have recently been detected from whole pieces of mechanically exfoliated graphene and molybdenum disulfide (MoS2) nanosheets, and magnetism of the two nanomaterials was claimed based on these observations. However, non-magnetic interactions or artefacts are commonly associated with MFM signals, which make the interpretation of MFM signals not straightforward. A systematic investigation has been done to examine possible sources of the MFM signals from graphene and MoS2 nanosheets and whether the MFM signals can be correlated with magnetism. It is found that the MFM signals have significant non-magnetic contributions due to capacitive and electrostatic interactions between the nanosheets and conductive cantilever tip, as demonstrated by electric force microscopy and scanning Kevin probe microscopy analyses. In addition, the MFM signals of graphene and MoS2 nanosheets are not responsive to reversed magnetic field of the magnetic cantilever tip. Therefore, the observed MFM response is mainly from electric artefacts and not compelling enough to correlate with magnetism of graphene and MoS2 nanosheets.

Identificador

http://hdl.handle.net/10536/DRO/DU:30069231

Idioma(s)

eng

Publicador

American Institute of Physics

Relação

ARC DP110101188

http://dro.deakin.edu.au/eserv/DU:30069231/li-electriccontributions-2014.pdf

http://www.dx.doi.org/10.1063/1.4903040

Direitos

2014, American Institute of Physics

Palavras-Chave #Science & Technology #Physical Sciences #Physics, Applied #Physics #POINT-DEFECTS #FERROMAGNETISM #GRAPHITE #FILMS
Tipo

Journal Article