时间：本周五6月12日下午3点-4点
地点：硅所1号楼一楼报告厅
Nanoporous metals for function
金海军 中国科学院金属研究所
The nanoporous (np) metals can be formed in a corrosion process called dealloying. These materials have open, nanoscale porous structure and very high specific surface area. More importantly, they are macroscopic (mm-scale or larger) materials with considerable strength and compression ductility. The combination of these features has enabled some very interesting functions and unique properties of the nanoporous metals, which cannot be matched by the conventional fully-dense solids. This talk will present a couple of functions of this kind: i) the nanoporous metals can expand and contract reversibly in the electrochemical environment when the applied voltage is changed, which leads to the potential application for actuation; ii) the mechanical properties, including the strength and elasticity, of the nanoporous metals can be tuned recoverably in response to voltage changes, while the mechanical properties of conventional materials are usually set permanently by the composition and structure; iii) one our recent study shows that, the actuation and strength-changing ability can also be achieved in np metals simply by controlling the water content, which won’t require electrochemical controls – this finding may lead to the development of “metallic artificial muscles” that can propel micro-robots in future by harvesting energy from the environment.
报告人简介：金海军，研究员。1997年毕业于浙江大学材料系，获金属材料及热处理专业学士学位。2004年于中国科学院金属研究所获得材料学博士学位，毕业后留所任助理研究员。2005年至2010年在德国卡尔斯鲁厄研究中心纳米技术研究所从事博士后研究，其间曾获德国洪堡基金会资助。2010年7月入选中科院“百人计划”项目，回到金属所任研究员和创新课题组组长。目前主要研究方向为纳米多孔金属材料的制备和表征、力学性能、以及表面诱发电化学驱动、力性往复调节等功能应用探索。研究成果发表于Science，Acta Mater.，Nano Lett.等期刊。
