Electron Spin Resonance Spectroscopic Study of Size-Controlled Ink Particles Isolated from Sepia officinalis

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概要

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• The paramagnetic properties of size-controlled ink particles isolated from the ink sacs of Sepia officinalis were studied by electron spin resonance (ESR) spectroscopy. Both the size-controlled ink particles and synthetic melanins seemingly yielded similar ESR spectra consisting of a singlet with a slightly asymmetrical signal. However, the progressive microwave power saturation revealed a clear difference between their paramagnetic behaviors. In comparison with synthetic melanins, the ESR spectra of the ink particles readily reached saturation, indicating a long spin–lattice relaxation time. On the other hand, the ESR linewidth depended on particle size. This implies that the particle size is related to the distance between paramagnetic species in the particles. Hence, it is reasonable that the large ink particle has the weakest spin–spin interaction among these samples. The employment of the size-controlled ink particles enabled us to determine precisely the paramagnetic parameters of Sepia inks.

• 2010-06-25

著者

• MATSUURA Toshihiko

  Laboratory of Biotechnology, Hokkaido University of Education

• Akutagawa Sei-ichi

  Laboratory Of Soft Matter Physics Graduate School Of Emergent Functional Science Muroran Institute O

• Yuhei Shimoyama

  Laboratory of Soft Matter Physics, Graduate School of Emergent Functional Science, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan

• Watanabe Shingo

  Laboratory of Soft Matter Physics, Graduate School of Emergent Functional Science, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan

• Takanori Kobayashi

  Hokkaido Industrial Technology Center, Hakodate, Hokkaido 041-0801, Japan

• Yoshihiro Taya

  Hokkaido Industrial Technology Center, Hakodate, Hokkaido 041-0801, Japan

• Takashi Ueno

  Department of Material and Environmental Engineering, Hakodate National College of Technology, Hakodate, Hokkaido 042-8501, Japan

• Toshihiko Matsuura

  Laboratory of Biotechnology, Hokkaido University of Education, Hakodate, Hokkaido 040-8567, Japan

• Shingo Watanabe

  Laboratory of Soft Matter Physics, Graduate School of Emergent Functional Science, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan

• Sei-ichi Akutagawa

  Laboratory of Soft Matter Physics, Graduate School of Emergent Functional Science, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan

関連論文

• Optical and Paramagnetic Properties of Size-Controlled Ink Particles Isolated from Sepia officinalis
• Electron Spin Resonance Spectroscopic Study of Size-Controlled Ink Particles Isolated from Sepia officinalis
• Utilization of Size-Controlled Squid Ink Particles as Enhancer for the Porosity of Titania Electrode in Dye-Sensitized Solar Cell (Special Issue : Microprocesses and Nanotechnology)
• Paramagnetic Properties of Size-Controlled Squid Ink Particles Dispersed in Water

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