香港大学材料系Alfonso H.W. Ngan (颜庆云) 教授讲学通知
应我校3777金沙娱场城黄永江副教授邀请，香港工程科学院Fellow，香港大学工程学院副院长颜庆云教授近日将来我校访问，并进行学术讲座，欢迎感兴趣的老师同学参加。
报告人简介：
颜庆云教授现为香港大学教授，香港工程科学院Fellow，香港大学工程学院副院长，在金属材料的力学性能-结构相关性、薄膜材料的力学性能、力学性能表征、位错理论、原子尺度金属材料的结构特征、金属材料的缺陷理论及仿真等方面在国际上享有盛誉。在国际高水平期刊发表学术论文200余篇，被引用4200余次，H因子达31。
报告一
题目：When mechanics meets chemistry – novel redox actuators made from nickel hydroxide
时间：2017年7月20日上午8:30
地点：3777金沙娱场城322
摘要：In this talk, I will report a novel electrochemical actuating property of nickel hydroxide, with the actuation mechanism mainly due to reversible faradic redox reactions. Benefiting from the stable Ni(II)/Ni(III) redox couples in an electrolyte medium, highly reversible and stable actuation is observed under triggering voltages of less than 1 volt. By appropriate design of the actuating material with respect to the passive materials in a device, high actuation strains that can rival conducting polymers or even human muscles can be achieved. Also, by conditioning the structure of the actuator into a nanowire network morphology that facilitates ion transport, record high strain response time in the order of 0.1 second can be obtained, which is more than two orders faster than the current metallic based actuators.
报告二
题目：Nanomechanics and Dislocation-density Plasticity
时间：2017年7月20日上午10:00
地点：3777金沙娱场城322
摘要：
Successful developments of technology often arise from or depend on the unique properties of materials especially when their size shrinks to the submicron length scale. In the first part of this talk, I will describe a variety of nanomechanical techniques, including atomic force microscopy, nanoindentation, optical tweezers and so on, and their application to a number of problems in both physical and biological sciences. In physical applications, the focus is on understanding how small material volumes differ from bulk counterparts, in terms of their strength and deformation under mechanical loading. In biomedical sciences, the properties of cornea, dental tissues, and antibody-antigen protein interactions will be discussed as examples to show how the mechanical and other physical properties of the relevant small building blocks of life can be related to the relevant diseases and disorders. A special rate-jump method for characterizing the hardness and elastic modulus properties of soft materials will be described.
颜庆云教授拟在我校招收2018年级博士生（2018年9月入学），研究方向为:
(1) Novel actuating materials for artificial muscle applications based on chemo-mechanics principles
(2) Direct printing of ceramic materials by microfluidic electrodeposition
(3) Computational dislocation-based plasticity
欢迎感兴趣的材料、物理、化学、机械等背景的2018年毕业的本科生或者研究生申请。感兴趣的同学可直接联系 Prof. Ngan，联系方式：hwngan@hku.hk，或者可以于2018年7月20日下午13：30-15：00在3777金沙娱场城427面谈。
个人主页：http://hub.hku.hk/cris/rp/rp00225，个人英文简介请见附件!
