Optical and Paramagnetic Properties of Size-Controlled Ink Particles Isolated from Sepia officinalis

Toshihiko MATSUURA; Midori HINO; Sei-ichi AKUTAGAWA; Yuhei SHIMOYAMA; Takanori KOBAYASHI; Yoshihiro TAYA; Takashi UENO

doi:10.1271/bbb.90602

Biochemistry & Molecular Biology Notes

Optical and Paramagnetic Properties of Size-Controlled Ink Particles Isolated from Sepia officinalis

Toshihiko MATSUURA, Midori HINO, Sei-ichi AKUTAGAWA, Yuhei SHIMOYAMA, Takanori KOBAYASHI, Yoshihiro TAYA, Takashi UENO

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Keywords: Sepia ink, particle size, atomic force microscopy (AFM), ultraviolet-visible (UV-VIS) spectroscopy, electron spin resonance (ESR)

JOURNAL FREE ACCESS

2009 Volume 73 Issue 12 Pages 2790-2792

DOI https://doi.org/10.1271/bbb.90602

View "Advance Publication" version (December 7, 2009).

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Abstract

The optical and paramagnetic properties of size-controlled ink particles isolated from ink sacs of Sepia officinalis were investigated. Topographic images of atomic force microscopy (AFM) revealed that the average heights of the large and small ink particles were 156 nm and 5.3 nm respectively. The ultraviolet-visible (UV-VIS) spectral features of aqueous solutions of ink particles were dependent on particle size. Electron spin resonance (ESR) spectra suggested that the ink particles are highly pure for paramagnetic species and are of reliable quality. These size-controlled ink particles are suitable for a basic study of melanin-related materials.

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