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Formation of GaSb core-shell nanofibers by a thermally induced phase decomposition process

机译：通过热诱导相分解过程形成GaSb核壳纳米纤维

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摘要

Dense networks of amorphous GaSb nanofibers were fabricated by ion irradiation of bulk GaSb, and following formation, they were thermally annealed at a low temperature. Contrary to expectations, annealing of the GaSb fibers at just 50% of their melting temperature resulted in complete chemical decomposition of the nanofibers into core-shell structures consisting of crystalline Sb cores surrounded by amorphous shells. In this study, we investigate the transition of the single-phase nanofibers to their core-shell configuration, and we analyze the unique, temperature-dependent phase decomposition process. Thermodynamic considerations are discussed, and a model is presented to explain the thermally induced decomposition of the GaSb semiconductor fibers into core-shell structures, based upon the singular interaction of several size-dependent material properties.
机译：非晶态GaSb纳米纤维的致密网络是通过块状GaSb的离子辐照制造的，形成后，它们在低温下进行热退火。与预期相反，GaSb纤维仅在其熔化温度的50％处退火导致纳米纤维完全化学分解为核-壳结构，该结构由无定形壳包围的结晶Sb核组成。在这项研究中，我们研究了单相纳米纤维向其核-壳结构的过渡，并分析了独特的，温度相关的相分解过程。讨论了热力学方面的考虑，并提出了一种模型，以基于几种尺寸相关的材料特性的奇异相互作用，解释GaSb半导体纤维热诱导分解为核-壳结构的过程。

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  • 来源
    《Journal of Materials Research》 |2009年第7期|2286-2292|共7页
  • 作者

    Alejandro G. Perez-Bergquist; Kai Sun; Lumin Wang; Yanwen Zhang;

  • 作者单位

    Department of Nuclear Engineering and Radiological Sciences and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109;

    Department of Nuclear Engineering and Radiological Sciences and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109;

    Department of Nuclear Engineering and Radiological Sciences and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109;

    Pacific Northwest National Laboratory, Richland, Washington 99352;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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