Microwave Makes Carbon Nanotubes Less Defective

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• 作者：Wei Lin ; Kyoung-Sik Moon ; Shanju Zhang ; Yong Ding ; Jintang Shang ; Mingxiang Chen ; Ching-ping Wong
• 刊名：ACS Nano
• 出版年：2010
• 出版时间：March 23, 2010
• 年：2010
• 卷：4
• 期：3
• 页码：1716-1722
• 全文大小：430K
• 年卷期：0
• ISSN：1936-086X

文摘

An ultrafast microwave annealing process has been developed to reduce the defect density in vertically aligned carbon nanotubes (CNTs). Raman and thermogravimetric analyses have shown a distinct defect reduction in the CNTs annealed in microwave for 3 min. Fibers spun from the as-annealed CNTs, in comparison with those from the pristine CNTs, show increases of ∼35% and ∼65%, respectively, in tensile strength (∼0.8 GPa) and modulus (∼90 GPa) during tensile testing; an ∼20% improvement in electrical conductivity (∼80000 S m⁻¹) was also reported. The mechanism of the microwave response of CNTs was discussed.