Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 89 , Issue 8
Showing 1-5 articles out of 5 articles from the selected issue
Original Research Paper
Note
  • Yo Sasaki, Toshiyuki Oba, Mitsunobu Iwasaki
    2016 Volume 89 Issue 8 Pages 258-263
    Published: August 20, 2016
    Released: November 20, 2016
    JOURNALS FREE ACCESS

    We developed an educational material with which the crystal form and color property of hybrid sulfate double salt crystal growing from solution can be selected by chemical composition of precursor material of the hybrid sulfate double salt crystal. A pale pink color (L*=83.64, a*=0.26, b*=-0.57) radial crystal grows from precursor ([K2Mg(SO4)2-6H2O]:[K2Mn(SO4)2-4H2O]=50:50) and a pale red color (L*=76.54, a*=13.38, b*=0.39) radial crystal grows from precursor ([K2Mn(SO4)2-4H2O]:[K2Co(SO4)2-6H2O] =75:25). Then a pale red color (L*=76.54, a*=13.38, b*=0.39) block crystal, a pale green color (L*=87.34, a*=-0.64, b*=-1.00) block crystal, and a pale blue color (L*=86.21, a*=-0.27, b*=-0.95) block crystal grow from precursor ([K2Mg(SO4)2- 6H2O]:[K2Co(SO4)2-6H2O]=99:1), ([K2Mg(SO4)2-6H2O]:[K2Ni(SO4)2-6H2O]=99:1), and ([K2Mg(SO4)2-6H2O]:[K2Cu(SO4)2-6H2O] =99:1) respectively.

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Current Topics
  • Akihiro Wakisaka
    2016 Volume 89 Issue 8 Pages 264-267
    Published: August 20, 2016
    Released: November 20, 2016
    JOURNALS RESTRICTED ACCESS

    The Femtoreactor is a smart technology that can control chemical processes in an ultra-small droplet of several micrometers (volume of femto-liter level) prepared by electrospray. This makes the precise control of chemical processes possible based on the obvious increase in the speed of mixing of two solutions and separation of products. This is applicable to the synthesis of metal nanoparticles of single nano size with a narrow distribution. The application of the Femtoreactor with electrospray in a liquid medium gave an insight into the control of various chemical processes.

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Review
  • Haibin Wang, Takaya Kubo, Hiroshi Segawa
    2016 Volume 89 Issue 8 Pages 268-273
    Published: August 20, 2016
    Released: November 20, 2016
    JOURNALS RESTRICTED ACCESS

    Large reduction in solar power generation cost is essential to utilize sunlight as one of the basic energy resources for social activities. In this light, there is a growing attention to organic photovoltaics and hybrid solar cells developed with novel materials and new structures. Colloidal quantum dots(CQDs) are promising absorbers for the solar cells because the absorption band can be tuned to cover a wider range of solar spectrum. In this paper, current situation of in QDC-based solar cells is reviewed. Recent our results on PbS CQD solar cells with ZnO nanowire arrays are also reported.

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Serial Lecture
  • Hideki Sakai, Takeshi Endo
    2016 Volume 89 Issue 8 Pages 274-279
    Published: August 20, 2016
    Released: November 20, 2016
    JOURNALS RESTRICTED ACCESS

    Preparation of nano-structured silica materials using molecular assemblies formed by surfactants as “structure directing agents (SDA)” is described. First, preparation of mesoporous silica particles with controlled pore size and structure using aqueous mixtures of anionic and cationic surfactants as SDA is introduced. Next, silica hollow particles with size around 30 nm and highly dispersible in water are prepared using vesicles formed by cationic surfactant mixtures as SDA and applied for anti-reflection films. Furthermore, silica nanotubes are successfully prepared using myelin figures formed by Pluronic type surfactants as SDA. Finally, the mechanism of morphological changes in SDAs accompanying the sol/gel reaction of silica precursors is discussed based on the obtained results.

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