Aqueousoxidation reaction enabled layer-by-layer corrosion of semiconductor nanoplatesinto single-crystalline 2D nanocrystals with single layer accuracy and ionicsurface capping
Aqueousoxidation reaction enabled layer-by-layer corrosion of semiconductor nanoplatesinto single-crystalline 2D nanocrystals with single layer accuracy and ionicsurface capping
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水氧化反应能够将半导体纳米板逐层腐蚀成具有单层精度和离子表面覆盖的单晶二维纳米晶体
DOI：
10.1039/c5cc09732k
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Jiatao Zhang
中科院分区：
文献类型：
--
作者：
Muwei Ji;Meng Xu;Jun Zhang;Jiajia Liu;Jiatao Zhang
提出了一种可实现逐层腐蚀的可控水氧化反应，以制备具有单层精度和良好保留六边形形状的高质量二维（2D）半导体纳米晶体。适当的氧化剂，如H2O2、Fe(NO3)3和HNO3，不仅可以将层状晶体结构的Bi2Te3纳米片逐层腐蚀为单五元层，而且可以协同地取代有机屏障成为表面的离子配体。 AFM分析用于确认从侧面到中心的逐层剥落。结合精确的 XRD、LRTEM 和 HRTEM 表征，研究了可控氧化反应实现水层逐层腐蚀的机理。
A controllable aqueous oxidation reaction enabled layer-by-layer corrosion has been proposed to prepare high-quality two-dimensional (2D) semiconductor nanocrystals with single layer accuracy and well-retained hexagonal shapes. The appropriate oxidizing agent, such as H2O2, Fe(NO3)3, and HNO3, could not only corrode the layered-crystalline-structured Bi2Te3 nanoplates layer-by-layer to be a single quintuple layer, but also replace the organic barriers to be ionic ligands on the surface synergistically. AFM analysis was used to confirm the layer-by-layer exfoliation from the side to the center. Together with precise XRD, LRTEM and HRTEM characterizations, the controllable oxidation reaction enabled aqueous layer-by-layer corrosion mechanism has been studied.