Structure-Controlled Synthesis of Single-Walled Carbon Nanotubes
Feng Yang and Yan Li
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Single-walled carbon nanotubes (SWNTs) present structure-determined outstanding properties and SWNTs with a single (n, m) type are needed in many advanced applications. However, the chirality-specific growth of SWNTs is always a great challenge. We proposed to use catalysts with unique atomic arrangements as the templates for SWNTs and developed a new family of catalyst, tungsten-based intermetallic nanocrystals, to grow SWNTs with specified chiral structures. Such intermetallic nanocrystals present unique structure, which are distinctly different from the normal alloy nanoparticles or simple metal nanocrystals, therefore are ideal catalysts 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.
Kew words: single-walled carbon nanotubes, chirality, catalysts, intermetallic compounds
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Yan Li graduated from Shandong University with a Bachelor’s degree in chemistry in 1987 thenreceived her Ph.D in inorganic chemistry from Peking University in 1993. After two years’ postdoctoral research, she joined the faculty of Chemistry, Peking University in 1995. From 1999 to 2001, she was a visiting Associate Professor at Duke University. She has been the full professor of chemistry at Peking University since 2002. She won National Outstanding Youth Fund of China in 2011 and was awarded as Chang Jiang Scholar by Chinese Ministry of Education in 2014. She is also appointed as distingguished visiting professor in The University of Tokyo since 2016. She is a fellow of Royal Society of Chemistry. Her research is focused on carbon nanomaterials, especially the preparation, modification, characterization and application of carbon nanotubes. She has published more than 140 papers in peer-rviewed journals. Her research on chirality-specified growth of single-walled carbon nanotubes was listed as Top 10 Chemical Research in 2014 by Chemical & Engineering News. Currently, she is also serving as the associated editor for ACS Nano and on the advisory boards of Materials Horizons and Journal of Materials Chemistry A.