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超薄Bi2S3纳米线:在集群-纳米晶体过渡的表面和核心结构
Jordan W Thomson1, Ludovico Cademartiri, Mark MacDonald
1Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada.
Journal of the American Chemical Society
|June 18, 2010
概括
我们使用先进的光谱学来表征超薄的硫化 (Bi(2) S(3)) 纳米线. 核心中的石原子表现出更高的协调,表明表面连接体结合.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态化学 固态化学
背景情况:
- 结合体稳定的超薄 bismuth 硫化物 (Bi(2) S(3)) 纳米线是有前途的纳米材料.
- 了解它们的核心和表面结构对于应用至关重要.
研究的目的:
- 为了进行超薄Bi(2) S(3) 纳米线的全面结构特征.
- 为了阐明表面连接体的协调化学.
主要方法:
- 射线吸收光谱 (XAS),包括扩展射线吸收细结构 (EXAFS) 和射线吸收近边缘结构 (XANES).
- 在X射线光电谱学 (XPS).
- 核磁共振 (NMR) 光谱学.核磁共振 (NMR) 光谱学.
主要成果:
- 无机核心和表面连接体的最终结构特征得到了实现.
- 核心的原子结构类似于大批 bismuthinite.
- 比斯原子的协调数显著高,与大批量相比.
结论:
- 比斯原子的更高的协调数归因于表面连接体的结合.
- 提出了一个模型,其中表面木原子与至少一个连接体结合.
- 这项研究提供了对超薄硫化物纳米线结构的基本见解.
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