碘在单壁碳纳米管内的结构转变
Iodine confined in single-walled carbon nanotubes(SWNTs)exhibits novel structural properties. Iodine molecules adopt electrons from SWNTs to form charged polyiodide chains In(n=3,5…)，and interestingly，the polyiodide chains array in the form of single，double or triple helical structures inside different diameters of SWNTs. We investigated the structural transition of iodine confined in SWNTs using Raman spectroscopy. The results show that charged polyiodide chains in SWNTs transform into iodine molecules with temperature increasing，while the reverse process occurs when the temperature decreases. Due to this reversible transition is accompanied by electron transfer between iodine and SWNTs，iodine filled SWNTs provides an approach to modulate the electronic band structure of SWNTs via varying temperatures. This may have some applications in nano-electroniCS based on carbon nanotubes with specific properties.
单壁碳纳米管 结构转变 碘元素
王志永 施祖进 顾镇南
北京分子科学国家实验室(筹),稀土材料化学和应用国家重点实验室,北京大学化学与分子工程学院,北京 100871
国内会议
呼和浩特
中文
411-412
2007-07-18（万方平台首次上网日期，不代表论文的发表时间）