| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for removing impurities from a crude product containing carbon tubes encapsulating metal by an easy method and for manufacturing high purity carbon tubes encapsulating metal. SOLUTION: The purified carbon tubes encapsulating metal are manufactured by suspending a crude product containing nanoscale carbon tubes encapsulating metal in a solvent to prepare a suspension (which may contain a surfactant), irradiating the suspension liquid with ultrasonic waves, separating the supernatant containing carbon tubes encapsulating metal in a static state, and separating carbon tubes encapsulating metal from the separated supernatant. COPYRIGHT: (C)2004,JPO
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