The Experts below are selected from a list of 76455 Experts worldwide ranked by ideXlab platform

Sung Huh - One of the best experts on this subject based on the ideXlab platform.

  • Preparation and characterization of smart hydrogel nanocomposites sensitive to oxidation–reduction
    Polymer Bulletin, 2012
    Co-Authors: Jin Kyoung Kim, Chitragara Basavaraja, Tomohiko Yamaguchi, Sung Huh
    Abstract:

    Honeycomb-patterned hydrogel films sensitive to environmental oxidation–reduction supporting nanoparticle by adsorption were fabricated through the photopolymerization of ruthenium(4-vinyl-4′-methyl-2,2′-bipyridine)bis(2,2′-bipyridine)bis(hexaflurophosphate) and N-isopropylacrylamide. Nanoparticle adsorption by the hydrogel film was controlled by the dynamic changes in the surface morphology of the film in relation to environmental oxidation–reduction, which induces change of the oxidized and reduced states of ruthenium ion included in the hydrogel. For the adsorption of nanoparticles in the patterned hydrogel film, silver nanoparticles were immobilized in the hydrogel surface. Adsorptivity was obtained through measuring the Released Concentration of the silver nanoparticles using UV–vis spectroscopy in an aqueous solution. Desorption of Ag nanoparticles from the hydrogel surface was found to be larger in the oxidizing solution than in the reducing solution.

Jin Kyoung - One of the best experts on this subject based on the ideXlab platform.

  • Preparation and characterization of smart hydrogel nanocomposites sensitive to oxidation-reduction
    2013
    Co-Authors: Jin Kyoung
    Abstract:

    Honeycomb-patterned hydrogel films sensitive to environmental oxida- tion-reduction supporting nanoparticle by adsorption were fabricated through the photopolymerization of ruthenium(4-vinyl-4 0 -methyl-2,2 0 -bipyridine)bis(2,2 0 -bipyr- idine)bis(hexaflurophosphate) and N-isopropylacrylamide. Nanoparticle adsorption by the hydrogel film was controlled by the dynamic changes in the surface morphology of the film in relation to environmental oxidation-reduction, which induces change of the oxidized and reduced states of ruthenium ion included in the hydrogel. For the adsorption of nanoparticles in the patterned hydrogel film, silver nanoparticles were immobilized in the hydrogel surface. Adsorptivity was obtained through measuring the Released Concentration of the silver nanoparticles using UV-vis spectroscopy in an aqueous solution. Desorption of Ag nanoparticles from the hydrogel surface was found to be larger in the oxidizing solution than in the reducing solution.

Yuta Furudate - One of the best experts on this subject based on the ideXlab platform.

  • Investigation on Concentration characteristics of ozone micro-bubbles fixed in ice and ozone gas Released from ice
    International Journal of Refrigeration, 2015
    Co-Authors: Koji Matsumoto, Koji Furuya, Shiying Zhang, Yoshikazu Teraoka, Daisuke Tsubaki, Yuta Furudate
    Abstract:

    Ice formed from water in which ozone gas is dissolved is promising for the cold storage of foods because of the ozone's sterilization and deodorization capabilities. However, effective dissolution of ozone gas in water and taking ozone gas into ice are not easy. Furthermore, the decomposition rate of the ozone itself is usually very fast, regardless of its phase. Thus, to effectively take ozone gas into ice, the authors have developed ice containing ozone micro-bubbles. In this paper, ice containing ozone micro-bubbles formed by adding surfactant was kept for a desired time at a desired constant temperature without melting of the ice. The Concentration of ozone micro-bubbles fixed in ice and the ozone gas Concentration Released from ice by melting were measured to investigate the ozone decomposition rate due to fixation in ice and the characteristics of the Released Concentration. Furthermore, the influences of surfactant on both Concentrations were examined.

Jin Kyoung Kim - One of the best experts on this subject based on the ideXlab platform.

  • Preparation and characterization of smart hydrogel nanocomposites sensitive to oxidation–reduction
    Polymer Bulletin, 2012
    Co-Authors: Jin Kyoung Kim, Chitragara Basavaraja, Tomohiko Yamaguchi, Sung Huh
    Abstract:

    Honeycomb-patterned hydrogel films sensitive to environmental oxidation–reduction supporting nanoparticle by adsorption were fabricated through the photopolymerization of ruthenium(4-vinyl-4′-methyl-2,2′-bipyridine)bis(2,2′-bipyridine)bis(hexaflurophosphate) and N-isopropylacrylamide. Nanoparticle adsorption by the hydrogel film was controlled by the dynamic changes in the surface morphology of the film in relation to environmental oxidation–reduction, which induces change of the oxidized and reduced states of ruthenium ion included in the hydrogel. For the adsorption of nanoparticles in the patterned hydrogel film, silver nanoparticles were immobilized in the hydrogel surface. Adsorptivity was obtained through measuring the Released Concentration of the silver nanoparticles using UV–vis spectroscopy in an aqueous solution. Desorption of Ag nanoparticles from the hydrogel surface was found to be larger in the oxidizing solution than in the reducing solution.

Koji Matsumoto - One of the best experts on this subject based on the ideXlab platform.

  • Investigation on Concentration characteristics of ozone micro-bubbles fixed in ice and ozone gas Released from ice
    International Journal of Refrigeration, 2015
    Co-Authors: Koji Matsumoto, Koji Furuya, Shiying Zhang, Yoshikazu Teraoka, Daisuke Tsubaki, Yuta Furudate
    Abstract:

    Ice formed from water in which ozone gas is dissolved is promising for the cold storage of foods because of the ozone's sterilization and deodorization capabilities. However, effective dissolution of ozone gas in water and taking ozone gas into ice are not easy. Furthermore, the decomposition rate of the ozone itself is usually very fast, regardless of its phase. Thus, to effectively take ozone gas into ice, the authors have developed ice containing ozone micro-bubbles. In this paper, ice containing ozone micro-bubbles formed by adding surfactant was kept for a desired time at a desired constant temperature without melting of the ice. The Concentration of ozone micro-bubbles fixed in ice and the ozone gas Concentration Released from ice by melting were measured to investigate the ozone decomposition rate due to fixation in ice and the characteristics of the Released Concentration. Furthermore, the influences of surfactant on both Concentrations were examined.