应学校邀请，兰州大学客座教授、英国谢菲尔德大学材料科学与工程系纳米实验中心Beverley J Inkson教授将于5月19日至25日来我校访问、讲学，并于5月20日下午面向全校师生做学术报告，敬请关注！
报告题目：Materials in Motion : Real time imaging of nanoparticle transformation and tribology by in-situ TEM
报告时间：2015年5月20日（星期三）下午16:00
Many technologies now use composites with hierarchical structures engineered down to the nanoscale. Nanoparticles, nanowires and nano-platelets are active components in many composites, including engineering alloys, battery electrodes, sensors and biomaterials. The successful integration of nanocomponents into larger micro-structures does not, however, guarantee long-term performance. The effect of long-term thermal, electrical and mechanical stimuli can cause significant change in nanomaterials structure and function.
In this talk we will examine how real-time imaging of nanoscale contacts inside electron microscopes, can be used to investigate the dynamics of material interactions and the evolution of nanostructures with time. The formation of nanoscale electrical circuitsin-situin SEM and TEM has enabled direct imaging of the time-dependant structural stability of a range of functional nanostructures including carbon nanotubes, particles and battery components. We demonstrate the use of a miniaturized TEM triboprobe which can apply long-term cyclic mechanical stresses at the nanoscale. This enables nanoscale fatigue testing of nanoparticles and nanowires to quantify their long-term mechanical stability. The use of the TEM Triboprobe will be illustrated by examples including phase transformations in carbon nanoparticles, mechanical fatigue of silicon, and quantification of nanoparticle motion between sliding surfaces.
Dept of Material Science and Engineering, University of Sheffield, UK
Prof Inkson was educated at Cambridge University, with a first class degree in Physics/Natural Sciences, and a PhD in Materials Science. After a Research Fellowship at Cambridge she moved to the Max Planck Institute for Metals Research, Stuttgart, Germany as an Alexander von Humboldt Fellow. She returned to the UK to Oxford University with a prestigious Royal Society Research Fellowship to set up a group in Nanomechanics, and moved to Sheffield in 2003, where she was appointed Professor in 2011 and directs the Sheffield NanoLAB.
Prof Inkson has extensive experience in the analysis of structural, mechanical and electrical properties of nanostructured materials using of electron and ion microscopy. She is particularly known for her development of 3D tomographic characterisation methods, and more recently developing novelin-situmeasurement techniques to determine real-time dynamical behaviour of nanomaterials and nanoparticles under mechanical and electrical stimuli. This world-leading research has been partially supported by a ?3million EPSRCBasic Technology Programme.
