Cross-sectional image of a rope comprising hexagonally packed parallel single- walled carbon nanotubes.单层碳纳米管東 Nature396,323-324(1998) DAVID E LUZZICross-sectional image of a rope comprising hexagonally packed parallel single-walled carbon nanotubes. 单层碳纳米管束 Nature 396, 323 - 324 (1998) DAVID E. LUZZI*