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Experimental studies on magnetization in the excited state by using the magnetic field effect of light scattering based on multi-layer graphene particles suspended in organic solvents

Content Provider	Royal Society of Chemistry (RSC)
Author	Hu, Bin Xu, Hengxing Li, Mingxing He, Lei
Copyright Year	2017
Abstract	This article reports on experimental studies on magnetic polarization in the excited state by using magnetic field effects of light scattering (MFELS) together with a photoexcitation beam based on fluorinated multi-layer graphene (FG) particles suspended in an organic solvent. We observe that a magnetic field can change the light scattering of a 532 nm laser beam from the suspended FG particles, generating a MFELS signal with an amplitude of 60% at 900 mT. This phenomenon indicates that the suspended FG particles experience a magnetization force, leading to an orientation of the suspended FG particles in a magnetic field. We find that the magnetization force is a function of a solvent dielectric constant, an analogue phenomenon similar to magneto-electric coupling. More importantly, in the excited state the suspended FG particles exhibit more pronounced MFELS, as compared with the ground state, when the magnetic field effects of light scattering are combined with a photoexcitation beam of 325 nm. Clearly, the FG particles in the excited state possess a stronger magnetization relative to the ground state. This excitation-enhanced magnetization suggests an interaction between the magnetization from the localized spins and the polarization from delocalized π electrons in the FG particles. Therefore, the magnetic field effects of light scattering provide a convenient experimental method to investigate the magnetization of nanoparticles in the excited state.
Starting Page	2563
Ending Page	2568
Page Count	6
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	9
Issue Number	7
Journal	Nanoscale
DOI	10.1039/c6nr08148g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Graphene Scattering Relative permittivity Laser Magnetic field Solvent MFELS Photoexcitation
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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