Prof. Li Yan from Peking University research team to solve the problem of carbon nanotube application

Prof. Li Yan from the School of Chemistry and Molecular Engineering at Peking University has achieved significant progress in the controllable chiral growth of single-walled carbon nanotubes. The findings were recently published in *Nature*, offering a promising solution to a long-standing challenge in the controlled synthesis of these nanomaterials. This breakthrough paves the way for broader applications, particularly in the field of carbon-based electronics. As silicon-based CMOS technology approaches its physical limits in the coming decade, the need for next-generation electronic materials becomes increasingly urgent. In 2009, the International Semiconductor Roadmap Committee highlighted carbon nanotubes and graphene as key candidates for post-Moore era electronics, predicting they could achieve commercial viability within 10 to 15 years. However, the lack of precise control over the growth of carbon nanotubes has remained a major obstacle in realizing this vision. After over a decade of dedicated research, Prof. Li Yan has made substantial strides in understanding the mechanisms behind carbon nanotube growth and the role of catalysts. Based on this knowledge, he developed a novel method for achieving structure- and chirality-controlled growth of single-walled carbon nanotubes. His team designed a class of tungsten-based alloy catalysts that maintain structural integrity at high temperatures, ensuring the formation of crystalline nanotubes. These catalysts also feature a unique atomic arrangement that guides the growth direction, enabling precise control over the final properties of the nanotubes. This study was supported by the National Natural Science Foundation of China's Outstanding Youth Fund and the Ministry of Science and Technology’s Major Research Project. It also benefited from collaborations with institutions such as the Hong Kong Polytechnic University, the Institute of Physics at the Chinese Academy of Sciences, and the Shanghai Synchrotron Radiation Source. The results mark a critical step forward in the development of advanced nanoelectronics and highlight the growing importance of precision in nanomaterial synthesis.

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