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Building Quantum Dots into Solids with Well-Defined Shapes

机译：将量子点构建为形状明确的实体

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摘要

Quantum dots (QDs) chemically synthesized in solution at a higher temperature (85 ℃) were built in situ into a variety of three-dimensional (3D) close-packed QD ensembles (QD solids) with well-defined shapes: needles, disks, rods, spheres, bundles, stars, ribbons, and transition structures (TSs). Design strategies using a novel cold-treatment (-25 to 0 ℃) process immediately following the synthesis of the QDs provided control over these shapes, independently from the II-VI materials used. Transformation occurred between different shapes by the rearrangement of the QDs within the QD ensembles. The QD solids were characterized by advanced electron microscopy and photoluminescence spectroscopy. The cold treatment strategy is versatile and as been applied to several II-VI QDs (CdS, ZnS, and CdSe) and may be extended to other QD systems and other chemical approaches.
机译：在较高温度（85℃）下在溶液中化学合成的量子点（QD）原位构建为各种形状明确的三维（3D）紧密堆积QD集合体（QD固体）：针，盘，棒，球体，束，星，带和过渡结构（TS）。量子点合成后立即采用新颖的低温处理（-25至0℃）的设计策略提供了对这些形状的控制，而与所使用的II-VI材料无关。通过在QD集合内重新排列QD，可以在不同形状之间进行转换。通过先进的电子显微镜和光致发光光谱对QD固体进行了表征。冷处理策略用途广泛，已应用于多种II-VI QD（CdS，ZnS和CdSe），并可扩展到其他QD系统和其他化学方法。

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  • 来源
    《Advanced Functional Materials》 |2003年第8期|p. 648-656|共9页
  • 作者

    Chuanbin Mao; Jifa Qi; Angela M. Belcher;

  • 作者单位

    Department of Chemistry & Biochemistry, Texas Materials Institute, and Center of Nano-and Molecular Science and Technology The university of Texas at Austin Austin, TX 78712 USA;

    Department of Chemistry & Biochemistry, Texas Materials Institute, and Center of Nano-and Molecular Science and Technology The university of Texas at Austin Austin, TX 78712 USA;

    Department of Chemistry & Biochemistry, Texas Materials Institute, and Center of Nano-and Molecular Science and Technology The university of Texas at Austin Austin, TX 78712 USA;

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  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
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