| 低温水热前驱物技术制备单晶PbS纳米片(英文) |
| Hydrothermal Precursor Approach to Single-crystal PbS Nanosheets at Low Temperature |
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| 摘要: 以层状的铅(Ⅱ)-硫脲配合物为前驱体，在130 ℃反应12 h水热分解得到高产量的半导体单晶PbS二维纳米片，产品用XRD、TEM、SEM、ED、XPS进行了表征，单晶PbS纳米片的二维尺寸为0.6～3 μm，厚度为2～4 nm，沿着ab平面生长。紫外吸收光谱和光致发光光谱表明二维PbS纳米片的量子尺寸效应非常显著。对可能的生长机理进行了探讨。 |
| 关键词: 硫化铅 水热技术 前驱体 纳米片 |
| 基金项目: |
| Abstract: Semiconductor PbS single-crystal nanosheets with micrometer-scale lateral dimensions have been synthesized on a large scale by hydrothermal decomposition of the lamellar precursor-Pb(Ⅱ)-thiourea complexes at a low temperature of 130 ℃ for 12 h. XRD， TEM， SEM， electron diffraction (ED) and XPS were used to characterize the final product. The products are sheet-like with rectangle lateral dimensions in the range of 0.6～3 μm and thickness of 2～4 nm which grow along the a and b axes two-dimensional (2D) direction simultaneously. UV-Vis absorption and Photoluminescence (PL) spectra reveal that the as-prepared products have shown considerably greater quantum size effects expected for the 2D ultrathin nanostructure. The possible formation mechanism has been proposed. |
| Keywords: PbS hydrothermal technique precursor nanosheet |
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| 胡寒梅,邓崇海,黄显怀,李 燕,孙 梅,张克华.低温水热前驱物技术制备单晶PbS纳米片(英文)[J].无机化学学报,2007,23(8):1403-1408. |
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