title: Optical and paramagnetic properties of size-controlled ink particles isolated from Sepia officinalis.
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.
authors: Laboratory of Biotechnology, Hokkaido University of Education, Hakodate, Japan. matsuura@hak.hokkyodai.ac.jp
authors: Toshihiko
authors: T
authors: Matsuura
authors: Midori
authors: M
authors: Hino
authors: Sei-ichi
authors: S
authors: Akutagawa
authors: Yuhei
authors: Y
authors: Shimoyama
authors: Takanori
authors: T
authors: Kobayashi
authors: Yoshihiro
authors: Y
authors: Taya
authors: Takashi
authors: T
authors: Ueno
mesh_terms: D000818:Animals; D008280:Magnetics; D055620:Optical Phenomena; D010316:Particle Size; D010860:Pigments, Biological / Q000737:chemistry* / Q000302:isolation & purification*; D049833:Sepia / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D010860:Pigments, Biological