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首页> 外文期刊>Advanced Functional Materials >Ultralong CdTe Nanowires: Catalyst-Free Synthesis and High-Yield Transformation into Core-Shell Heterostructures
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Ultralong CdTe Nanowires: Catalyst-Free Synthesis and High-Yield Transformation into Core-Shell Heterostructures

机译：超长CdTe纳米线：无催化剂合成和高产转化为核-壳异质结构

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摘要

A novel catalyst-free synthetic strategy for producing high-quality CdTe nanowires in solution is proposed. A special reaction condition is intentionally constructed in the reaction system to induce the formation of nanowires through oriented in situ assembly of tiny particles. To establish such special synthetic conditions in the CdTe system, not only are its typical features and possible solutions deeply analyzed, but also related factors, such as the ligand environment, injection and growth temperature, and Cd-to-Te precursor ratio, are systemically investigated. High-quality ultralong (up to 10 μm) and ultrathin (less than 10 nm) CdTe nanowires are produced in solution under optimal reaction conditions. Morphological, spectral, and compositional analyses are performed to examine the products formed at different reaction stages in order to clarify the formation mechanism of the CdTe nanowires. Furthermore, the transformation of the CdTe nanowires into CdTe/CdSe core-shell heterostructures is intensively explored, and the CdSe epitaxial growth process is specially tracked by morphological and spectral characterization techniques. Finally, CdTe nanowires coated with a continuous and dense CdSe shell are successfully fabricated by using a proper coating protocol.
机译：提出了一种在溶液中生产高质量CdTe纳米线的新型无催化剂合成策略。在反应系统中有意构建了特殊的反应条件，以通过定向的微小颗粒原位组装诱导纳米线的形成。为了在CdTe体系中建立这样特殊的合成条件，不仅要对CdTe体系的典型特征和可能的解决方案进行深入分析，而且还要系统地分析相关因素，例如配体环境，注入和生长温度以及Cd / Te前体比率。调查。在最佳反应条件下，在溶液中生产出高质量的超长（最大10μm）和超薄（小于10 nm）的CdTe纳米线。进行形态，光谱和成分分析以检查在不同反应阶段形成的产物，以阐明CdTe纳米线的形成机理。此外，深入研究了CdTe纳米线向CdTe / CdSe核-壳异质结构的转变，并通过形态学和光谱表征技术专门跟踪了CdSe外延生长过程。最后，通过使用适当的涂覆方案成功地制备了涂覆有连续且致密的CdSe壳的CdTe纳米线。

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  • 来源
    《Advanced Functional Materials》 |2012年第11期|p.2402-2411|共10页
  • 作者

    Feng Jiang; Jinjin Liu; Yunchao Li; Louzhen Fan; Yuqin Ding; Yongfang Li;

  • 作者单位

    Department of Chemistry Beijing Normal University Beijing, 100875, P. R.China;

    Department of Chemistry Beijing Normal University Beijing, 100875, P. R.China;

    Department of Chemistry Beijing Normal University Beijing, 100875, P. R.China;

    Department of Chemistry Beijing Normal University Beijing, 100875, P. R.China;

    Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, P. R. China;

    Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, P. R. China;

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