Size-, Shape-, and Composition-Controlled Synthesis and Localized Surface Plasmon Resonance of Copper Tin Selenide Nanocrystals
Size-, Shape-, and Composition-Controlled Synthesis and Localized Surface Plasmon Resonance of Copper Tin Selenide Nanocrystals
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DOI：
10.1021/acs.chemmater.5b00618
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发表时间：
2015-04
影响因子：
8.6
通讯作者：
Xianliang Wang;Xin Liu;Deqiang Yin;Yujie Ke;M. Swihart
中科院分区：
文献类型：
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作者：
Xianliang Wang;Xin Liu;Deqiang Yin;Yujie Ke;M. Swihart
我们报告了一种强大的方法来合成单分散的硒化铜锡（CTSe）纳米晶体（NCs），其尺寸、形状和组成可调，包括单晶纳米片、纳米板、球体和四面体。硒前驱体的性质和浓度对CTSe NCs的形貌和晶体结构有重要影响。与之前的研究相反，我们证明了铜锡比的广泛可调性。随着Sn掺入量的增加，CTSe NCs的尺寸不断减小。此外，通过改变Cu:Sn比，CTSe合金NCs的近红外（NIR）局域表面等离子体共振（LSPR）在较宽的范围内调谐。随着Sn含量的增加，LSPR红移强度减小。这表明自由载流子浓度可以通过改变阳离子比来控制。随着Sn含量的增加，NCs中导致自掺杂的阳离子缺乏症减少。所得到的CTSe NCs和相关材料…
We report a robust methodology for synthesizing monodisperse copper-tin-selenide (CTSe) nanocrystals (NCs) of tunable size, shape, and composition including single-crystalline nanosheets, nanoplates, spheres, and tetrahedra. Both the identity and concentration of the selenium precursor play important roles in determining the morphology and crystal structure of the CTSe NCs. In contrast to previous studies, we demonstrated broad tunability of the Cu to Sn ratio. The size of CTSe NCs continuously decreased with increasing Sn incorporation. Moreover, the near-infrared (NIR) localized surface plasmon resonance (LSPR) in CTSe alloy NCs was tuned over a broad range by varying the Cu:Sn ratio. The LSPR red-shifted and decreased in intensity with increasing Sn content. This indicates that the free charge carrier concentration can be manipulated by varying the cation ratio. The cation deficiency responsible for self-doping in these NCs decreases with increasing Sn content. The resulting CTSe NCs and related materi...