Professor Kaihui Liu's group from the School of Physics has made important progress in the characterization of the helical structure of a single carbon nanotube

Professor Liu Kaihui’s research group from the School of Physics of Peking University and the State Key Laboratory of Artificial Microstructure and Mesoscopic Physics and others proposed and developed the Rayleigh scattering circular dichroism spectroscopy technology to achieve the chiral structure and helical structure of a single carbon nanotube.

With the continuous reduction of the feature size of silicon-based chips and the continuous improvement of integration, short-channel effects and thermal effects have increasingly become the bottleneck restricting the development of chips, and the operating speed and performance of existing electronic devices have approached the material limit

In the past ten years, Professor Liu Kaihui and Academician Wang Enge from the School of Physics of Peking University, Professor Wang Feng from the University of California, Berkeley, and Researcher Bai Xuedong from the Institute of Physics of the Chinese Academy of Sciences have jointly developed a number of highly sensitive nanospectroscopy characterization techniques.

Helicity is one of the most basic quantum structural properties of carbon nanotubes

Figure 1.

In response to the above-mentioned basic problems and major needs, Kaihui Liu's research group and collaborators proposed and developed the Rayleigh scattering circular dichroism spectroscopy technology to achieve the complete determination of the chiral structure and helical structure at the level of a single carbon nanotube (Figure 2)

Figure 2.

Peking University School of Physics 2015 PhD student Yao Fengrui, postdoctoral fellow Yu Wentao, postdoctoral creative talent support program candidate Liu Can are the co-first authors, and Liu Kaihui is the corresponding author

The above-mentioned research work has been supported by the National Natural Science Foundation of China, the National Key Research and Development Program, the Beijing Municipal Natural Science Foundation, the Guangdong Province Key Field Research and Development Program, and the Collaborative Innovation Center of Quantum Matter Science, Peking University Nanoelectronics Frontier Science Center and Peking University Electron Microscopy Laboratory, etc.