题目题目: Coordination-resolved electron spectrometrics

报告人:孙长庆新加坡南洋理工大学

地  点:物理学院物理楼333室

时  间: 2016年6月1号上午9:30-11:00

主持人：崔田教授

摘要：This talk shares our recent efforts toward resolving atomistic, dynamic, local, and quantitative information regarding bond relaxation and electron energetics pertaining to undercoordinated atoms of point defects, terrace edges, monolayer skins, nanocrystals and heterocoordinated impurities and interfaces. We have used the developed strategies to clarify, correlate, formulate, and quantify the following from the perspective of irregular-coordination induced bond relaxation and its associated quantum entrapment and polarization:

1)Energy levels of an isolated atom and their bulk shifts

2)Catalytic nature of Pt and Rh adatoms and Cu/Pd and Ag/Pd alloys

3)Edge-discriminative generation of graphitic Dirac-Fermi polarons (see figure)

4)Size dependence and emergence of anomalies for nanocrystals

  Complementing STM/S and photoelectron spectroscopy, this set of approaches is extremely useful in monitoring the energetic, electronic, and geometric behavior of irregularly coordinated atoms under external stimuli. Further extension may lead to multi-field-resolved Bond-Electron-Phonon-Photon Spectrometrics, promoting undercoordination Physics and heterocoordination Chemistry.

简 介：

孙长庆，辽宁建昌人。英国皇家化学会和物理学会Fellow。键弛豫理论创始人、原子尺度电子与声子计量谱学技术发明者、分别于2005年和2012年获得首届南洋科技创新奖和夸瑞兹密一等奖。

近期代表论著[1-6]：

1.Sun, C.Q. and Y. Sun, The Attribute of Water: Single Notion, Multiple Myths. Springer Ser. Chem. Phys. Vol. 113. 2016, Heidelberg: Springer-Verlag. 494 pp.

2.Zhang, X., et al., Water’s phase diagram: from the notion of thermodynamics to hydrogen-bond cooperativity. Progress in Solid State Chemistry, 2015. 43: p. 71-81.

3.Zhang, X., et al., From ice supperlubricity to quantum friction: Electronic repulsivity and phononic elasticity. Friction, 2015. 3(4): p. 294-319.

4.Liu, X.J., et al., Coordination-resolved electron spectrometrics. Chemical Reviews, 2015. 115(14): p. 6746-6810.

5.Huang, Y.L., et al., Hydrogen-bond relaxation dynamics: Resolving mysteries of water ice. Coordination Chemistry Reviews, 2015. 285: p. 109-165.

6.Sun, C.Q., Relaxation of the Chemical Bond. Springer Ser. Chem. Phys. Vol. 108. 2014, Heidelberg: Springer-Verlag. 807 pp.