电弧放电中纳米洋葱状富勒烯生成机理的研究Studies on the Growth Mechanism of Nano-onion-like Fullerenes in Arc Discharge
许并社,闫小琴,王晓敏,市野濑英喜,解思深
摘要(Abstract)：
探索了用传统的电弧放电法、在现有的电弧放电装置中 ,通过改进放电工艺、添加催化剂制备纳米洋葱状富勒烯 (NanoOnion likeFullerenesNOLFs)的过程和工艺。用高分辨透射电镜 (HighResolutionTransmissionElectronMicroscopeHRTEM)对生成的NOLFs进行了形貌、结构的观察与表征。分析结果表明NOLFs晶化程度很高 ,直径均匀 (2 0～ 5 0nm)。生成的NOLFs可分为两大类 :(1)内包金属纳米微粒的NOLFs;(2 )单体NOLFs。对NOLFs的生成机理及催化剂对其直径、收率的影响进行了讨论。据此建立的汽 -液 -固 (Vapor Liquid Solid :VLS)生长模型可以解释实验中出现的一些现象。研究表明生成NOLFs的数量、直径分别与催化剂的活性及其尺寸有关。
关键词(KeyWords)： 纳米洋葱状富勒烯(NOLFs);电弧放电;高分辨透射电镜(HRTEM);汽-液-固生长模型
基金项目(Foundation): 国家杰出青年科学基金 (50 0 2 51 0 3) ;; 国家自然科学基金 (59871 0 32 )资助项目
作者(Author): 许并社,闫小琴,王晓敏,市野濑英喜,解思深
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