Abstract
Gas flow is used to guide the growth of ultralong single-walled carbon nanotubes(SWCNTs) with complex shapes. Large-area cross-shaped networks of ultralong SWCNTsare obtained by a two-step chemical vapor deposition process. Also non-straight SWCNTsof different shapes are prepared by modifying the gas flow with tiny barriers.The shapes of the SWCNTs replicate the streamline patterns accordingly. TheSWCNTs with designed patterns and shapes may be used in high performancenanoelectronics.
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