Cation Exchange Induced Transformation of InP Magic-Sized Clusters
Cation Exchange Induced Transformation of InP Magic-Sized Clusters
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DOI：
10.1021/acs.chemmater.7b03075
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发表时间：
2017-09
影响因子：
8.6
通讯作者：
J. L. Stein;M. Steimle;M. Terban;A. Petrone;S. Billinge;Xiaosong Li;B. Cossairt
中科院分区：
文献类型：
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作者：
J. L. Stein;M. Steimle;M. Terban;A. Petrone;S. Billinge;Xiaosong Li;B. Cossairt
魔术大小的团簇(MSCs)可以提供有价值的洞察原子精确的半导体纳米晶体相变的进程。我们报道了InP MSC通过阳离子交换机制转变为Cd3P2 MSC的过程，并试图阐明转变过程中团簇的物理和电子结构的演变。利用光谱(核磁共振/UV-Vis)和结构表征(ICP-OES/MS/PXRD/XPS/PDF)工具，我们证明了当Z型配体交换发生时，原始InP MSC晶格保持不变。进一步的阳离子交换导致晶格松弛和显著的结构重排。这些观察结果与InP量子点中阳离子交换的报道形成对比，表明InP MSC具有独特的反应性。
Magic-sized clusters (MSCs) can provide valuable insight into the atomically precise progression of semiconductor nanocrystal transformations. We report the conversion of an InP MSC to a Cd3P2 MSC through a cation exchange mechanism and attempt to shed light on the evolution of the physical and electronic structure of the clusters during the transformation. Utilizing a combination of spectroscopic (NMR/UV–vis) and structural characterization (ICP-OES/MS/PXRD/XPS/PDF) tools, we demonstrate retention of the original InP MSC crystal lattice as Z-type ligand exchange initially occurs. Further cation exchange induces lattice relaxation and a significant structural rearrangement. These observations contrast with reports of cation exchange in InP quantum dots, indicating unique reactivity of the InP MSC.