英国伯明翰大学 郭全民博士 11月13日上午学术报告

发布时间:2018-11-11访问量:145设置

Presenter郭全民博士(英国伯明翰大学

TopicSupported metal-organic clusters: stability, mobility and orientational polymorphism

Time9: 30 AM, November 13th (Tuesday)

Location909-B

  

Abstract

We have recently investigated a Fullerene-metal coordinated system and produced magic number, hybrid (C60)m-Aun clusters on the Au(111) surface. The smallest magic number cluster, (C60)7-Au19, consists of a hexagonal 19-Au atom island capped by seven C60 molecules. The 19-Au island on its own is not stable beyond 200 K, a (C60)7 cluster on its own is not stable beyond 240 K. The hybrid cluster, however, is stable up to 400 K. The hybrid clusters are held together by neither directional H-bonding nor covalently bonding. Instead, the collective interaction among all the constituents within the cluster is responsible for the stability of the cluster. The nature of such globally optimized interaction gives the clusters some interesting properties: i) Ripening into magic sizes. ii) The ability of the cluster to self-repair and re-shape. iii) Anomalous diffusion via a break-transition-settle route which could be a more general phenomenon for loosely assembled clusters.

  

Biography

郭全民于1984得清大学学士学位,1989得英国开斯特大学博士。郭全民是英国物理学会会士(Fellow Inst. Phys.),英国物理学会米物理与技分会始人。英国伯明翰大学物理与天文学院。研究域包括表面科学,米物理与技,低特性,原子与分子自装。在国期刊表文章100余篇。重要研究成果包括创始发展了金属原子与有机分子合的幻数簇的研究,硫醇分子自分子膜构的描隧道分析,二氧化表面重构及其构的探索。

代表作:

1. L. Guo, Y. T. Wang, D. Kaya, R. E. Palmer, G-D. Chen, Q. Guo. Nano Lett. 18 (2018) 5257-5261.

2. D. Kaya, D-L. Bao, R. E. Palmer, S-X. Du, Q. Guo. Nano Lett.17 (2017) 6171.

3. Y-C Xie, L. Tang, Q. Guo. Phys. Rev. Lett.111 (2013) 186101.

4. F. S. Li, L. Tang, W-C. Zhou, Q. Guo, J. Am. Chem. Soc. 132 (2010) 13059.

5. Q. Guo, P. Fallon, J. Yin, R. E. Palmer, N. Bampos, J. K. M. Sanders, Adv. Mater. 15 (2003) 1084.

  

联系人:迟力峰教授


责任编辑:鹿鸣


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