Investigation of MoS2 and Graphene Nanosheets by Magnetic Force Microscopy

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• 作者：Hai Li ; Xiaoying Qi ; Jumiati Wu ; Zhiyuan Zeng ; Jun Wei ; Hua Zhang
• 刊名：ACS Nano
• 出版年：2013
• 出版时间：March 26, 2013
• 年：2013
• 卷：7
• 期：3
• 页码：2842-2849
• 全文大小：682K
• 年卷期：v.7,no.3(March 26, 2013)
• ISSN：1936-086X

文摘

For the first time, magnetic force microscopy (MFM) is used to characterize the mechanically exfoliated single- and few-layer MoS₂ and graphene nanosheets. By analysis of the phase and amplitude shifts, the magnetic response of MoS₂ and graphene nanosheets exhibits the dependence on their layer number. However, the solution-processed single-layer MoS₂ nanosheet shows the reverse magnetic signal to the mechanically exfoliated one, and the graphene oxide nanosheet has not shown any detectable magnetic signal. Importantly, graphene and MoS₂ flakes become nonmagnetic when they exceed a certain thickness.

Keywords:

magnetic force microscopy; MoS₂; graphene; nanosheet; phase shift