Academic Report of “BBS” of College of Science (Forty Five)

Title: Controllable Growth of Two-dimension Nano Materials

Reporter: Changchun Institute of Optics of Fine Mechanics and Physics, Chinese Academy of Sciences, Xu Hai Researcher and Doctorial Advisor

Time: At10:00 AM On Sep. 7th, 2017

Place: B119, Building of Science

Report Summaries:

We present a general way for controllably growing MoX2-x nanostructures, which were formed directly by the self-assembly of Mo and S (Se) atoms into prefer ordered MX2-x nano phases on the metal and HOPG surface. The structure of MoX2-x  nanostructures were analyzed by using STM and in situ Q-plus AFM, as well as XPS and HREELS. Particularly, on MoX2 ultrathin nanowires, spatially resolved scanning tunneling spectroscopy (STS) measurements reveal a strong edge state were tuned periodically to form a unique well-order electronic supperlattice oscillation, which is arising from the effects of electron-lattice coupling along the MoX2 wires. Furthermore, we demonstrate that the phase tuning in MoX2-x could be archived by controlling the MBE growth conditions.

Introduction of the Reporter:
Dr. Xu Hai is a researcher of Changchun Institute of Fine Mechanics and Physics, Chinese Academy of Sciences and doctorial advisor. He graduated from Beijing Physics Institute of Chinese Academy of Sciences in 1998 and obtained doctoral degree of science. Dr. Xu Hai was engaged in low dimensional material growth and surface physics research work in Max-Planck Institute for Microstructural Physics in Germany, University of Singapore and Research Center of for Materials and Structures of French Academy of Sciences (Toulouse) successively. He joined in American Zyvex Nano Technology Company to engage in research and development of Atomic Precise Manufacturing. In 2016, he returned home and joined in Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences and he was selected as “hundred talents program” technical talents of Chinese Academy of Sciences and “high-level innovative and entrepreneurial talents” in Jilin Province.