In the afternoon of October 13, 2022, Professor Wang Xun from the Department of Chemistry of Tsinghua University was invited by Professor Huang Hui to give a lecture on " Sub-1nm Ultrathin Nanocrystals " at the University of Chinese Academy of Sciences.

As research in nanoscience continues to advance, more and more research is now focused on the bottom end of the "nanoworld": the scale of one nanometer or so or even one nanometer below, which is defined as "sub-nanometer" scale materials.

Polymeric materials are widely used because of their flexibility and good processing characteristics. However, inorganic materials tend to be hard and brittle in mechanical processing due to the composition of polar bonds, which limits the practical application of the materials to some extent. Prof. Wang Xun started with the inorganic nanowires in their previous work. They found that these inorganic nanowires have certain properties of polymer materials, so Wang Xun's group took this as a starting point and used electron microscopy to observe that the nanowires have very obvious structural flexibility, the skeleton can be bent in all directions arbitrarily, and even self-winding to form closed rings; and the dispersion of this nanowire has a polymer solution with After that, Prof. Wang Xun's group extended the system and discovered a wide range of properties of sub-nanomaterials. They then investigated two-dimensional and clustered sub-nanomaterials and found that these materials have good mechanical and electrochemical properties, greatly expanding the applications of sub-nanomaterials. After the presentation, Prof. Wang Xun received a warm applause from the students and faculty.

Xun Wang, professor in the Department of Chemistry, Tsinghua University, China. He was awarded the "Outstanding Young Scientist Fund" by the National Natural Science Foundation of China in 2007 and the "Cheung Kong Scholar Distinguished Professorship" in 2014. He is the Deputy Secretary General of the Chinese Chemical Society and the Deputy Secretary General of the Nanomaterials and Devices Branch of the Chinese Society for Materials Research.