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首页> 外文期刊>Crystal growth & design >One-dimensional Anisotropic Electronic States in Needle-shaped La5Ti2CuS5O7 Single Crystals Grown in Molten Salt in Bridgman Furnace
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One-dimensional Anisotropic Electronic States in Needle-shaped La5Ti2CuS5O7 Single Crystals Grown in Molten Salt in Bridgman Furnace

机译：在布里奇曼炉中熔盐生长的针状LA5Ti2cus507中的一维各向异性电子态

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摘要

High-quality needle-like crystals of La5Ti2CuS5O7 (a ternary transition-metallic oxysulfide) as long as 1 mm and a few in diameter were grown in CsCl molten-salt flux. This synthesis process was performed in a Bridgman furnace with slow motion of charge across the heating zone. Transmission electron microscopy/diffraction analysis indicated that they are product crystallites without crystalline intergrowth, and that the longitudinal direction of needle crystals is parallel to crystallographic b axis of La5Ti2CuS5O7. Optical polarized ultraviolet visible reflectance spectroscopy provided the first experimental evidence of the one-dimensional electronic excitation along the b axis of this material. The spectroscopic peaks are assigned to the transitions between the electronic bands aided by numerical calculations on the basis of density functional theory (DFT). The advantages of this synthetic process will be applicable in general for oxysulfides that are useful as optical and photocatalytic materials.
机译：在CSCL熔融盐通量中生长La5Ti2cus5O7（三核过渡金属氧化金属氧氟硫醚）的高质量针状晶体（三元过渡 - 金属氧氟硫醚）。该合成方法在布里奇曼炉中进行，在加热区上具有慢动作的电荷运动。透射电子显微镜/衍射分析表明它们是没有结晶晶体的产品微晶，并且针晶体的纵向方向平行于La5Ti2cus5O7的晶形B轴。光学偏振紫外线可见光反射光谱谱提供了沿着该材料的B轴的一维电子激发的第一实验证据。基于密度泛函理论（DFT），将光谱峰分配给通过数值计算辅助的电子频带之间的过渡。该合成方法的优点通常适用于可用作光学和光催化材料的氧硫化物。

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  • 来源
    《Crystal growth & design》 |2019年第4期|共9页
  • 作者

    Iwase Motoki; Nakabayashi Mamiko; Shibata Naoya; Matsuzaki Hiroyuki; Kobayashi Hisayoshi; Yamada Taro; Domen Kazunari; Watanabe Tomoaki;

  • 作者单位

    Meiji Univ Org Strateg Coordinat Res &

    Intellectual Property Tama Ku 1-1-1 Higashimita Kawasaki Kanagawa 2148571 Japan;

    Univ Tokyo R&

    D Lab Japan Technol Res Assoc Artificial Photosynthet C 7-3-1 Hongo Tokyo 1138656 Japan;

    Univ Tokyo R&

    D Lab Japan Technol Res Assoc Artificial Photosynthet C 7-3-1 Hongo Tokyo 1138656 Japan;

    Natl Inst Adv Ind Sci &

    Technol Tsukuba Cent 2 1-1-1 Umezono Tsukuba Ibaraki 3058568 Japan;

    Kyoto Inst Technol Fac Engn &

    Design Dept Chem &

    Mat Technol Sakyo Ku Goshokaido Cho Kyoto 6068585 Japan;

    Univ Tokyo R&

    D Lab Japan Technol Res Assoc Artificial Photosynthet C 7-3-1 Hongo Tokyo 1138656 Japan;

    Univ Tokyo R&

    D Lab Japan Technol Res Assoc Artificial Photosynthet C 7-3-1 Hongo Tokyo 1138656 Japan;

    Meiji Univ Org Strateg Coordinat Res &

    Intellectual Property Tama Ku 1-1-1 Higashimita Kawasaki Kanagawa 2148571 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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