Shape-Selective Formation of Monodisperse Copper Nanospheres and Nanocubes via Disproportionation Reaction Route and Their Optical Properties
Shape-Selective Formation of Monodisperse Copper Nanospheres and Nanocubes via Disproportionation Reaction Route and Their Optical Properties
复制标题
通过歧化反应路线择形形成单分散铜纳米球和纳米立方体及其光学性质
DOI：
10.1021/jp5014187
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发表时间：
2014-05-08
影响因子：
3.7
通讯作者：
Peng, Dong-Liang
中科院分区：
文献类型：
--
作者：
Guo, Huizhang;Chen, Yuanzhi;Peng, Dong-Liang
合成稳定、单分散、形貌可控的铜纳米晶是一个长期存在的挑战。在这篇文章中，我们报告了一种在有机溶剂中合成此类纳米晶的简便歧化反应方法。根据条件的不同，可以生产球形或立方形。典型的铜纳米球是尺寸为23.4±1.5 nm的单晶，可以大规模自组装成三维(3D)纳米晶超晶格。通过控制化学添加剂，还获得了尺寸可调的单分散铜纳米立方体。讨论了这些铜纳米晶可能的形成机理。即使表面等离子体共振峰位于带间过渡区，窄的尺寸分布也会导致强的表面等离子体共振峰。在较大尺寸的铜纳米立方体的消光光谱中观察到双SPR峰。消光光谱的理论模拟表明，L的自旋回波吸收带具有很强的自旋回波特性。
Synthesis of stable and monodisperse Cu nanocrystals of controlled morphology has been a long-standing challenge. In this Article, we report a facile disproportionation reaction approach for the synthesis of such nanocrystals in organic solvents. Either spherical or cubic shapes can be produced, depending on conditions. The typical Cu nanospheres are single crystals with a size of 23.4 ± 1.5 nm, and can self-assemble into three-dimensional (3D) nanocrystal superlattices with a large scale. By manipulating the chemical additives, monodisperse Cu nanocubes with tailorable sizes have also been obtained. The probable formation mechanism of these Cu nanocrystals is discussed. The narrow size distribution results in strong surface plasmon resonance (SPR) peaks even though the resonance is located in the interband transition region. Double SPR peaks are observed in the extinction spectra for the Cu nanocubes with relative large sizes. Theoretical simulation of the extinction spectra indicates that the SPR band l...