Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 82 , Issue 12
Showing 1-6 articles out of 6 articles from the selected issue
Original Research Paper
  • Hiroshi FUKUSHIMA, Masachika HASHINO, Kenichi SAKAI, Hideki SAKAI, Tam ...
    2009 Volume 82 Issue 12 Pages 545-548
    Published: December 20, 2009
    Released: April 09, 2010
    Microcapsules have attracted much attention as a drug career. In the current study, we have prepared biodegradable poly (lactide-co-glycolide) (PLGA) microcapsules via the deposition of PLGA on W/O emulsion droplets. A combination of scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) demonstrates the formation of PLGA microcapsules with a diameter of 5∼10 μm. The formation mechanism of PLGA microcapsules is proposed on the basis of the experimental results.
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    2009 Volume 82 Issue 12 Pages 549-553
    Published: December 20, 2009
    Released: April 09, 2010
    Porous and crystalline TiO2 films were prepared on individual metallic Ti plates by the micro-arc oxidation (MAO) method. A novel dye-sensitized solar cell (DSSC) was fabricated ; a TiO2 film prepared on a metallic Ti plate was used as the cathode, and an indium tin oxide (ITO) glass plate was employed as the anode. This cell possessed characteristics of DSSC. The TiO2 films were prepared in NH4H2PO4, (NH4)2HPO4, and (NH4)3PO4 electrolyte solutions by MAO. Their crystal structures were characterized by an X-ray diffractometer (XRD), surface morphologies were observed by a scanning electron microscope (SEM), and thicknesses were measured using an eddy-current-type film thickness meter. The results indicated that all films comprised a single-phase of anatase TiO2, exhibited porous surfaces, and had thicknesses in the range of about 2∼5 μm. The effects of the electrolyte solutions on the TiO2 films prepared in them were evaluated. It was found that the TiO2 film prepared in (NH4)2HPO4 exhibited the smallest pore size, namely, 0.5 μm and the smoothest surface morphology. The maximum starting power of a DSSC fabricated in this study was 394.7 mV.
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  • Tomokazu YOSHIMURA
    2009 Volume 82 Issue 12 Pages 568-575
    Published: December 20, 2009
    Released: April 09, 2010
    Heterogemini surfactants with nonidentical headgroups such as ammonium and carboxylate (cationic - anionic), ammonium and gluconamide (cationic - nonionic), and ammonium and sulfobetaine (cationic - zwitterionic) were designed and synthesized, and their surface properties and aggregation behavior in aqueous solution were investigated. It was shown that they have high surface activities and unique aggregation behavior in comparison with the corresponding monomeric surfactants, gemini surfactants with the identical headgroups, and mixed monomeric surfactants.
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