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Masuda R, Kobayashi Y, Kitao S, et al. 61Ni synchrotron radiation-based Mössbauer spectroscopy of nickel-based nanoparticles with hexagonal structure. Sci Rep. 2016;6:20861doi: 10.1038/srep20861.
Masuda, R., Kobayashi, Y., Kitao, S., Kurokuzu, M., Saito, M., Yoda, Y., Mitsui, T., Hosoi, K., Kobayashi, H., Kitagawa, H., & Seto, M. (2016). 61Ni synchrotron radiation-based Mössbauer spectroscopy of nickel-based nanoparticles with hexagonal structure. Scientific reports, 620861. https://doi.org/10.1038/srep20861
Masuda, Ryo, et al. "61Ni synchrotron radiation-based Mössbauer spectroscopy of nickel-based nanoparticles with hexagonal structure." Scientific reports vol. 6 (2016): 20861. doi: https://doi.org/10.1038/srep20861
Masuda R, Kobayashi Y, Kitao S, Kurokuzu M, Saito M, Yoda Y, Mitsui T, Hosoi K, Kobayashi H, Kitagawa H, Seto M. 61Ni synchrotron radiation-based Mössbauer spectroscopy of nickel-based nanoparticles with hexagonal structure. Sci Rep. 2016 Feb 17;6:20861. doi: 10.1038/srep20861. PMID: 26883185; PMCID: PMC4756403.
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Sci Rep. 2016 Feb 17;6:20861. doi: 10.1038/srep20861.

61Ni synchrotron radiation-based Mössbauer spectroscopy of nickel-based nanoparticles with hexagonal structure.

Scientific reports

Ryo Masuda, Yasuhiro Kobayashi, Shinji Kitao, Masayuki Kurokuzu, Makina Saito, Yoshitaka Yoda, Takaya Mitsui, Kohei Hosoi, Hirokazu Kobayashi, Hiroshi Kitagawa, Makoto Seto

Affiliations

  1. Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan.
  2. Research and Utilization Division, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
  3. Condensed Matter Science Division, Sector of Nuclear Science Research, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
  4. Department of Chemistry, Faculty of Science, Kyushu University, 6-10-1, Hakozaki, Fukuoka 812-8581, Japan.
  5. Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.

PMID: 26883185 PMCID: PMC4756403 DOI: 10.1038/srep20861

Abstract

We measured the synchrotron-radiation (SR)-based Mössbauer spectra of Ni-based nanoparticles with a hexagonal structure that were synthesised by chemical reduction. To obtain Mössbauer spectra of the nanoparticles without (61)Ni enrichment, we developed a measurement system for (61)Ni SR-based Mössbauer absorption spectroscopy without X-ray windows between the (61)Ni84V16 standard energy alloy and detector. The counting rate of the (61)Ni nuclear resonant scattering in the system was enhanced by the detection of internal conversion electrons and the close proximity between the energy standard and the detector. The spectrum measured at 4 K revealed the internal magnetic field of the nanoparticles was 3.4 ± 0.9 T, corresponding to a Ni atomic magnetic moment of 0.3 Bohr magneton. This differs from the value of Ni3C and the theoretically predicted value of hexagonal-close-packed (hcp)-Ni and suggested the nanoparticle possessed intermediate carbon content between hcp-Ni and Ni3C of approximately 10 atomic % of Ni. The improved (61)Ni Mössbauer absorption measurement system is also applicable to various Ni materials without (61)Ni enrichment, such as Ni hydride nanoparticles.

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