Magnetic molybdenum disulfide nanosheet films.
Bulk molybdenum disulfide is known to be a nonmagnetic material. We have synthesized edge-oriented MoS2 nanosheet-like films that exhibit weak magnetism ( approximately 1-2 emu/g) and 2.5% magnetoresistance effects with a Curie temperature of 685 K. The magnetization is related to the presence of edge spins on the prismatic edges of the nanosheets. Spin-polarized calculations were performed on triangular-shaped cluster models in order to provide insight into the origin of magnetism on the edges as well as the size-property correlation in these MoS2 nanosheets. Our results imply that nanostructured films with a high density of edge spins can give rise to magnetism even though the bulk material is nonmagnetic.
Zhang
Jia
J
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
Soon
Jia Mei
JM
Loh
Kian Ping
KP
Yin
Jianhua
J
Ding
Jun
J
Sullivian
Michael B
MB
Wu
Ping
P
D003460:Crystallization / Q000379:methods*; D004220:Disulfides / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties
D004220:Disulfides; D046911:Macromolecular Substances; D008567:Membranes, Artificial; D008982:Molybdenum; C082964:molybdenum disulfide