EXAFS study of structural characteristics of nanocrystalline selenium with different grain sizes

• 来源期刊: 同步辐射装置用户科技论文集
• 学科: 工学
• 关键词: 硒 纳米结晶 结构特征 晶粒尺寸
• 年，卷（期）: 1999,（1）
• 页码范围: 30-33
• 页数: 4页
• 分类号: TB383

摘要

Extended x-ray-absorption fine-structure measurements(EXAFS) were performed on nanocrystalline (nc) elemental Se samples with grain sizes ranging from 13 to 60 nm.Accompanied with the previous study,we concluded that,with the refinement in nc.Se.the intrachain structure (the bond length,the coordination number)is unchanged while the interchain spacing is enlarged.The grain boundary in the nc Se is found to be in a low-energy configuration that is different from the disordered gaslike grain boundary structure.