【摘要】 分别通过控制ＣＶＤ生长时间的方法和在混合的硝酸硫酸中超声氧化碳纳米管的化学剪裁法制备了单壁碳纳米管短管．两种方法都能将大多数碳纳米管的长度控制在５００ ｎｍ以下．拉曼光谱结果表明：在化学剪裁过程中，单壁碳纳米管部分被破坏产生无定形碳杂质；用控制ＣＶＤ反应时间得到的单壁碳纳米管短管样品比长时间反应得到的长管样品杂质少，且不存在后处理时碳纳米管的破损问题，其纯度比化学剪裁法得到的产品纯度高．更多还原

【Abstract】 Short single walled carbon nanotubes (SWNTs) were prepared by shortening CVD growth time and by post-synthesis chemical oxidation with ultrasonication. Most of the SWNTs could be controlled to be shorter than 500 nm by both the two methods. However, Raman spectra show that shortening CVD time results in the decrease of amorphous carbon impurities, but in the oxidation process the damage of SWNTs occurred and amorphous carbon impurities increased. The short SWNTs directly synthesized by CVD have higher purity than that by chemical oxidation.更多还原