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Lei Jiang - One of the best experts on this subject based on the ideXlab platform.

  • lyophilic but nonwettable organosilane polymerized carbon dots inverse opals with closed Cell Structure
    ACS Applied Materials & Interfaces, 2018
    Co-Authors: Yuanyuan Shang, Ruixiang Hu, Bo Guan, Jingxia Wang, Tomiki Ikeda, Lei Jiang
    Abstract:

    This paper presents a unique lyophilic but nonwettable property of organosilane-polymerized carbon dots inverse opals photonic crystals (SiCDPCs) with closed-Cell Structure. Little stopband shift was observed for the SiCDPCs when being immersed into the solvents such as isopropanol, olive oil, DMSO, hexane, silicone oil, ethanediol, etc. but keeping lyophilic property. This could be attributed to the combined effect of closed-Cell Structure and the unique chemical composition of SiCDPCs. Furthermore, more than 30 kinds of organic solvents had been investigated, it was found that there were two kinds of factors that affected the stopband shift upon solvent’s immersing; one was the polarity of solvent, and the other one was the viscosity of solvent. That is, mainly nonpolar or high viscosity solvents showed lyophilic but nonwettable property. The distinct solvent-responsive behaviors of the SiCDPCs toward polar/nonpolar solvents had been utilized for the fabrication of 2D/3D pattern. Additionally, the as-pr...

  • Lyophilic but Nonwettable Organosilane-Polymerized Carbon Dots Inverse Opals with Closed-Cell Structure
    2018
    Co-Authors: Junchao Liu, Yuanyuan Shang, Bo Guan, Jingxia Wang, Zheng Xie, Junkai Ren, Tomik Ikeda, Lei Jiang
    Abstract:

    This paper presents a unique lyophilic but nonwettable property of organosilane-polymerized carbon dots inverse opals photonic crystals (SiCDPCs) with closed-Cell Structure. Little stopband shift was observed for the SiCDPCs when being immersed into the solvents such as isopropanol, olive oil, DMSO, hexane, silicone oil, ethanediol, etc. but keeping lyophilic property. This could be attributed to the combined effect of closed-Cell Structure and the unique chemical composition of SiCDPCs. Furthermore, more than 30 kinds of organic solvents had been investigated, it was found that there were two kinds of factors that affected the stopband shift upon solvent’s immersing; one was the polarity of solvent, and the other one was the viscosity of solvent. That is, mainly nonpolar or high viscosity solvents showed lyophilic but nonwettable property. The distinct solvent-responsive behaviors of the SiCDPCs toward polar/nonpolar solvents had been utilized for the fabrication of 2D/3D pattern. Additionally, the as-prepared SiCDPCs showed improved optical limiting property, exCellent low-temperature resistance, and abrasion tolerant property. It is of great importance for the development of multifunctional novel coating materials and creation of novel optical devices

Makoto Konagai - One of the best experts on this subject based on the ideXlab platform.

  • silicon quantum dot superlattice solar Cell Structure including silicon nanocrystals in a photogeneration layer
    Nanoscale Research Letters, 2014
    Co-Authors: Shigeru Yamada, Yasuyoshi Kurokawa, Shinsuke Miyajima, Makoto Konagai
    Abstract:

    The solar Cell Structure of n-type poly-silicon/5-nm-diameter silicon nanocrystals embedded in an amorphous silicon oxycarbide matrix (30 layers)/p-type hydrogenated amorphous silicon/Al electrode was fabricated on a quartz substrate. An open-circuit voltage and a fill factor of 518 mV and 0.51 in the solar Cell were obtained, respectively. The absorption edge of the solar Cell was 1.49 eV, which corresponds to the optical bandgap of the silicon nanocrystal materials, suggesting that it is possible to fabricate the solar Cells with silicon nanocrystal materials, whose bandgaps are wider than that of crystalline silicon.

  • Silicon quantum dot superlattice solar Cell Structure including silicon nanocrystals in a photogeneration layer
    Nanoscale Research Letters, 2014
    Co-Authors: Shigeru Yamada, Yasuyoshi Kurokawa, Shinsuke Miyajima, Makoto Konagai
    Abstract:

    The solar Cell Structure of n-type poly-silicon/5-nm-diameter silicon nanocrystals embedded in an amorphous silicon oxycarbide matrix (30 layers)/p-type hydrogenated amorphous silicon/Al electrode was fabricated on a quartz substrate. An open-circuit voltage and a fill factor of 518 mV and 0.51 in the solar Cell were obtained, respectively. The absorption edge of the solar Cell was 1.49 eV, which corresponds to the optical bandgap of the silicon nanocrystal materials, suggesting that it is possible to fabricate the solar Cells with silicon nanocrystal materials, whose bandgaps are wider than that of crystalline silicon. PACS 85.35.Be; 84.60.Jt; 78.67.Bf

Shigeru Yamada - One of the best experts on this subject based on the ideXlab platform.

  • silicon quantum dot superlattice solar Cell Structure including silicon nanocrystals in a photogeneration layer
    Nanoscale Research Letters, 2014
    Co-Authors: Shigeru Yamada, Yasuyoshi Kurokawa, Shinsuke Miyajima, Makoto Konagai
    Abstract:

    The solar Cell Structure of n-type poly-silicon/5-nm-diameter silicon nanocrystals embedded in an amorphous silicon oxycarbide matrix (30 layers)/p-type hydrogenated amorphous silicon/Al electrode was fabricated on a quartz substrate. An open-circuit voltage and a fill factor of 518 mV and 0.51 in the solar Cell were obtained, respectively. The absorption edge of the solar Cell was 1.49 eV, which corresponds to the optical bandgap of the silicon nanocrystal materials, suggesting that it is possible to fabricate the solar Cells with silicon nanocrystal materials, whose bandgaps are wider than that of crystalline silicon.

  • Silicon quantum dot superlattice solar Cell Structure including silicon nanocrystals in a photogeneration layer
    Nanoscale Research Letters, 2014
    Co-Authors: Shigeru Yamada, Yasuyoshi Kurokawa, Shinsuke Miyajima, Makoto Konagai
    Abstract:

    The solar Cell Structure of n-type poly-silicon/5-nm-diameter silicon nanocrystals embedded in an amorphous silicon oxycarbide matrix (30 layers)/p-type hydrogenated amorphous silicon/Al electrode was fabricated on a quartz substrate. An open-circuit voltage and a fill factor of 518 mV and 0.51 in the solar Cell were obtained, respectively. The absorption edge of the solar Cell was 1.49 eV, which corresponds to the optical bandgap of the silicon nanocrystal materials, suggesting that it is possible to fabricate the solar Cells with silicon nanocrystal materials, whose bandgaps are wider than that of crystalline silicon. PACS 85.35.Be; 84.60.Jt; 78.67.Bf

Hanxiong Huang - One of the best experts on this subject based on the ideXlab platform.

  • formation mechanism and tuning for bi modal Cell Structure in polystyrene foams by synergistic effect of temperature rising and depressurization with supercritical co2
    Journal of Supercritical Fluids, 2016
    Co-Authors: Hanxiong Huang
    Abstract:

    Abstract Polystyrene (PS) foams are fabricated using supercritical carbon dioxide (Sc-CO 2 ) as a physical foaming agent in a batch foaming process. It is demonstrated that a bi-modal Cell Structure (BMCS) is obtained by the synergistic effect of temperature rising and depressurization using a varying-temperature mode (VTM). The formation mechanism for the BMCS is revealed. Cell nucleation occurs in the supercritical CO 2 -saturated polymer both in temperature rising and depressurizing stages. The nuclei formed in the former stage develop into large Cells, whereas the ones formed in the latter stage evolve into small Cells. The effects of foaming temperature, saturation temperature, second saturation time and foaming pressure in the VTM on the Cellular Structure of PS foams were investigated. The results showed that no BMCS is formed when the foaming temperature is only 10 °C higher than saturation temperature. By manipulating the foaming parameters, the BMCS PS foams with a wide range of mean diameters (50.0–713.7 μm) and densities (2.1 × 10 3 –3.6 × 10 6  Cells/cm 3 ) for the large Cells, and a wide range of foam density (0.09–0.73 g/cm 3 ) are obtained.

  • foaming of poly lactic acid using supercritical carbon dioxide as foaming agent influence of crystallinity and spherulite size on Cell Structure and expansion ratio
    Industrial & Engineering Chemistry Research, 2014
    Co-Authors: Hanxiong Huang
    Abstract:

    Using supercritical carbon dioxide (Sc-CO2) as physical foaming agent, foamed poly(lactic acid) (PLA) samples were prepared in a batch process via constant- and varying-temperature modes (CTM and VTM). Their crystallinity, Cellular Structure, and expansion ratio were investigated. In the CTM, the samples foamed at low saturation temperatures present three regions (skin, inner, and core regions). The uniformity of Cellular Structure is much improved with increasing saturation temperature. In the VTM, saturation temperature exerts a significant impact on the size of spherulites formed in gas saturation stage. Large spherulites evolve into entities surrounded by elongated Cells or submicro-sized Cells in interlamellar regions after foaming at 140 °C and into small Cells (mean diameter of 0.6 μm) at 160 °C, whereas small spherulites generally evolve into stamen-like Cell Structure at 140 °C. Interestingly, uniform Cellular Structure with high expansion ratio (49.8) or bimodal Cellular Structure can be obtaine...

Yuanyuan Shang - One of the best experts on this subject based on the ideXlab platform.

  • lyophilic but nonwettable organosilane polymerized carbon dots inverse opals with closed Cell Structure
    ACS Applied Materials & Interfaces, 2018
    Co-Authors: Yuanyuan Shang, Ruixiang Hu, Bo Guan, Jingxia Wang, Tomiki Ikeda, Lei Jiang
    Abstract:

    This paper presents a unique lyophilic but nonwettable property of organosilane-polymerized carbon dots inverse opals photonic crystals (SiCDPCs) with closed-Cell Structure. Little stopband shift was observed for the SiCDPCs when being immersed into the solvents such as isopropanol, olive oil, DMSO, hexane, silicone oil, ethanediol, etc. but keeping lyophilic property. This could be attributed to the combined effect of closed-Cell Structure and the unique chemical composition of SiCDPCs. Furthermore, more than 30 kinds of organic solvents had been investigated, it was found that there were two kinds of factors that affected the stopband shift upon solvent’s immersing; one was the polarity of solvent, and the other one was the viscosity of solvent. That is, mainly nonpolar or high viscosity solvents showed lyophilic but nonwettable property. The distinct solvent-responsive behaviors of the SiCDPCs toward polar/nonpolar solvents had been utilized for the fabrication of 2D/3D pattern. Additionally, the as-pr...

  • Lyophilic but Nonwettable Organosilane-Polymerized Carbon Dots Inverse Opals with Closed-Cell Structure
    2018
    Co-Authors: Junchao Liu, Yuanyuan Shang, Bo Guan, Jingxia Wang, Zheng Xie, Junkai Ren, Tomik Ikeda, Lei Jiang
    Abstract:

    This paper presents a unique lyophilic but nonwettable property of organosilane-polymerized carbon dots inverse opals photonic crystals (SiCDPCs) with closed-Cell Structure. Little stopband shift was observed for the SiCDPCs when being immersed into the solvents such as isopropanol, olive oil, DMSO, hexane, silicone oil, ethanediol, etc. but keeping lyophilic property. This could be attributed to the combined effect of closed-Cell Structure and the unique chemical composition of SiCDPCs. Furthermore, more than 30 kinds of organic solvents had been investigated, it was found that there were two kinds of factors that affected the stopband shift upon solvent’s immersing; one was the polarity of solvent, and the other one was the viscosity of solvent. That is, mainly nonpolar or high viscosity solvents showed lyophilic but nonwettable property. The distinct solvent-responsive behaviors of the SiCDPCs toward polar/nonpolar solvents had been utilized for the fabrication of 2D/3D pattern. Additionally, the as-prepared SiCDPCs showed improved optical limiting property, exCellent low-temperature resistance, and abrasion tolerant property. It is of great importance for the development of multifunctional novel coating materials and creation of novel optical devices