Electrochemical synthesis and optical characterization of copper selenide nanowire arrays within the alumina pores
Electrochemical synthesis and optical characterization of copper selenide nanowire arrays within the alumina pores
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DOI：
10.1016/j.jcrysgro.2006.06.013
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发表时间：
2006-09-04
影响因子：
1.8
通讯作者：
Tomasiunas, R.
中科院分区：
文献类型：
--
作者：
Jagminas, A.;Juskenas, R.;Tomasiunas, R.
通过选择含有 CuSO4、H2SeO3、MgSO4 和 H2SO4 的适当水溶液，创建了在交流 (AC) 电解条件下在氧化铝孔内两相或一相硒化铜沉积的合适组合物。在 15-55 度 2 Theta 范围内记录的 X 射线衍射光谱揭示了 Cu3Se2+Cu2-xSe 或几乎纯的 Cu2-xSe 晶体材料的制造。使用 XRD、EDX、SEM 和 TEM 技术进行的成分和形态研究表明，当亚硒酸与铜离子的比例接近 1:2 且镀液 pH 值 < 1.25 时，可以制造出几乎纯的 Cu2-xSe，但缺少一些铜，例如 Cu1.75Se，纳米线的长度可达几微米。该纳米结构材料的基本吸收光谱是由允许的直接和间接带间跃迁形成的，评估的能带隙分别为 2.3 和 1.1 eV。 (c) 2006 Elsevier B.V. 保留所有权利。
By choosing an appropriate aqueous solution containing CuSO4, H2SeO3, MgSO4, and H2SO4 the suitable composition for two- or one-phase copper selenide deposition within the alumina pores under alternating current (AC) electrolysis conditions was created. X-ray diffraction spectra recorded within 15-55 degrees 2 Theta range revealed fabrication of Cu3Se2+Cu2-xSe or almost pure Cu2-xSe crystalline material. The compositional and morphological studies using XRD, EDX, SEM, and TEM techniques show fabrication of nearly pure Cu2-xSe with some deficiency of copper, say, Cu1.75Se, nanowires in length up to several microns when the selenious acid to copper ion ratio is close to 1:2 and pH of the bath is < 1.25. The fundamental absorption spectrum for this nanostructured material was shown to be formed by allowed direct and indirect interband transitions with the evaluated energy band gaps 2.3 and 1.1 eV, respectively. (c) 2006 Elsevier B.V. All rights reserved.