Confinement of selenium inside carbon nanotubes. Structural characterization by X-ray diffraction and X-ray absorption spectroscopy

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• 作者：Jé ; rome Chancolon ; Franç ; oise Archaimbault ; Sylvie Bonnamy ; Agnè ; s Traverse ; Luca Olivi and Gilberto Vlaic
• 关键词：Diffraction and scattering measurements ; X-ray diffraction ; Nanotubes ; Structure ; X-ray absorption
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2006
• 出版时间：1 February 2006
• 年：2006
• 卷：352
• 期：2
• 页码：99-108
• 全文大小：478 K

文摘

In order to study the effect of confinement on crystallographic arrangement, selenium (Se) was introduced into carbon nanotubes with average diameters of 12, 23 and 50 . The evolution of the Se long-range crystallographic arrangement and the Se short-range atomic surroundings was characterized by X-ray diffraction and X-ray absorption spectroscopy, respectively. A transition from an initially disordered trigonal structure, where part of the chains are not well connected, to a structure exhibiting well-organized rings was observed when the tube diameter was of the order of 12 . Se–C bonds, detected when nanotube average diameters were of the order of 20 and less, might play a role in the structural transition.