Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Investigation of Laser-Matter Interaction Utilizing Advanced Transmission Electron Microscopy" By Xiaohui Xu Purdue MSE Ph.D. Preliminary Exam Advisor: Professor Volkan Ortalan ABSTRACT Laser-matter interactions have been extensively investigated in the past few decades. Specifically, pulsed laser owns unique properties compared with continuous wave laser, which makes it popular in many fields. The effect of pulsed laser on materials is related to the nature of the material and width of laser pulse duration. By carefully adjusting laser pulse width and selecting the materials, laser synthesis can be achieved either by a bottom-up or a top-down way. Laser welding of plasmonic materials is another significant research area, whose mechanisms have not been fully understood. With the advent of the ultrafast transmission electron microscopy (UTEM), the in-situ investigation of laser-matter interactions becomes possible with both high spatial and temporal resolutions. Therefore, it is a unique instrument to explore possible laser synthesis routes and to obtain fundamental insights into the mechanisms of laser-matter interactions in general. Keywords: pulsed lasers, ultrafast transmission electron microscopy, laser-matter interactions, laser synthesis, plasmonic nanostructures. Date: Tuesday, November 7, 2017 Time: 10:00 A.M. Place: PHY 110