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Magnetic Orientational Linear Dichroism Spectra of Magnetic Nanoparticles as a Probe of the Dispersion State

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Abstract

Magnetic orientational linear dichroism (MOLD) spectra of magnetic nanoparticles (MNPs) in the UV-Vis wavelength region were found to be useful as a probe to detect changes of the dispersion state due to a restriction of the rotational Brownian motion of MNPs; a change of the medium from liquid to resin and the formation of agglomerates in solution. The magnetic-field dependence of MOLD was analyzed by using the Langevin equation, which gave information about the magnetic moment of MNPs.

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Acknowledgments

The authors thank Prof. Satoshi Tsukahara, Osaka University, for LD measurements. This study was financially supported by the Grant-in Aid for Scientific Research (B) (No. 262880660) and Challenging Exploratory Research (No. 256201120) of the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Authors and Affiliations

  1. Institute for NanoScience Design, Osaka University, Toyonaka, Osaka, 560-8531, Japan

    Hitoshi Watarai, Sana Subhan Memon Sakurai & Hana Subhan Memon Sakurai

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  1. Hitoshi Watarai
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  2. Sana Subhan Memon Sakurai
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  3. Hana Subhan Memon Sakurai
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Correspondence to Hitoshi Watarai.

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Watarai, H., Subhan Memon Sakurai, S. & Subhan Memon Sakurai, H. Magnetic Orientational Linear Dichroism Spectra of Magnetic Nanoparticles as a Probe of the Dispersion State. ANAL. SCI. 35, 951–954 (2019). https://doi.org/10.2116/analsci.19C006

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  • DOI: https://doi.org/10.2116/analsci.19C006

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