Single-walled carbon nanotubes (SWNTs) present outstanding properties essentially depending on their helical structures, which are described with the chiral index of (n, m). The chirality-specific synthesis of SWNTs is of great importance. We developed a new family of catalyst, tungsten-based intermetallic nanocrystals, to grow SWNTs with specified chiral structures. Such intermetallic nanocrystals present unique structure and atomic arrangements, which are distinctly different from the normal alloy nanoparticles or simple metal nanocrystals, therefore can act as the template to grow SWNTs with designed (n, m) structures. Using W6Co7 catalysts, we realized the selective growth of (12, 6), (16, 0), (14, 4) and other chiralities. By the cooperation of thermodynamic and kinetic factors, SWNTs with high chirality purity can be obtained.<br/>

Structure-controlled synthesis of single-walled carbon nanotubes

253rd National Meeting (2017)

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