Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
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Volume 87, Issue 2
Displaying 1-5 of 5 articles from this issue
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Original Research Paper
  • Preparation of Noble Metal / Titania-Core / Shell Nanoparticles and their Optical Properties
    Takashi KANDA, Kanjiro TORIGOE, Hirobumi SHIBATA, Masahiko ABE, Hideki ...
    2014 Volume 87 Issue 2 Pages 43-49
    Published: February 20, 2014
    Released on J-STAGE: May 20, 2014
    DOIhttps://doi.org/10.4011/shikizai.87.43
    JOURNAL FREE ACCESS
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    Noble metal / titania - core/shell nanopartcles were prepared using the interfacial chemical technique. Noble metal (Ag, Au) nanoparticles were prepared by the reduction of corresponding metal precursors with reductants (hydrazine or sodium borohydride) in the presence of cetyltrimethylammonium bromide (CTAB) as a protective agent. The spatially selective sol-gel reaction of titanium tetraisopropoxide (TTIP) was used to deposit titania shell on the surface of CTAB-coated noble metal nanoparticles as a core material. TEM observations revealed that individual core/shell nanoparticles with excellent dispersibility were successfully obtained. In addition, the nanoparticles were found to show unique optical properties (photochromic property for Ag/titania particles and photocatalytic activity under visible light irradiation for Au/titania particles) by irradiating visible light with wavelength corresponding to surface plasmon absorption of the core metal nanoparticles.
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Current Topics
  • Recent Research Trend in Underwater Superoleophobic Surfaces
    Shunsuke NISHIMOTO, Yusuke SAWAI, Yoshikazu KAMESHIMA, Michihiro MIYAK ...
    2014 Volume 87 Issue 2 Pages 50-53
    Published: February 20, 2014
    Released on J-STAGE: May 20, 2014
    DOIhttps://doi.org/10.4011/shikizai.87.50
    JOURNAL FREE ACCESS
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    Underwater superoleophobic surfaces inspired by snail sells and fish scales have attracted considerable attention. A flat TiO2 surface exhibited underwater superoleophobicity with an extremely high static oil contact angle (CA) of over 160° after UV irradiation. The TiO2 surface almost completely repelled the oil droplet in water. A robust TiO2 surface with no fragile nano-microstructure was fabricated on a Ti mesh with a pore size of approximately 150 µm. The fabricated mesh was found to be applicable as an oil/water separation filter.
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Review
  • Ion-Exchangeable Layered Clays
    ～Application as Host Materials for Functional Color Materials
    Ryo SASAI
    2014 Volume 87 Issue 2 Pages 54-58
    Published: February 20, 2014
    Released on J-STAGE: May 20, 2014
    DOIhttps://doi.org/10.4011/shikizai.87.54
    JOURNAL FREE ACCESS
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    In this review, author explained basic structural features and various properties of smectite, which is one of cation-exchangeable layered clay, and then, organo bentonite utilized in paint and ink industries, which is smectite modified by amphiphilic compound, introduced. Author introduced present R&D of solid color materials hybridizing various dyes with smectite by cation-exchange reaction. Moreover, possibility of smectite/dyes hybrid solid color materials as molecular sensing materials was referred.
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Serial Lecture
  • X-Ray Photoelectron Spectroscopy
    Risayo INOUE, Noriaki SANADA
    2014 Volume 87 Issue 2 Pages 59-63
    Published: February 20, 2014
    Released on J-STAGE: May 20, 2014
    DOIhttps://doi.org/10.4011/shikizai.87.59
    JOURNAL FREE ACCESS
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    X-ray photoelectron spectroscopy (XPS; also known as ESCA: Electron Spectroscopy for Chemical Analysis) is one of the most widely used surface analysis techniques. XPS provides the chemical information of solid surface with a depth of several nm (several tens of atomic layers). In this lecture paper, we provide the simplified principle of XPS, common knowledge of measurement method, and its application to pigment materials and devices.
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