6/1(一)專題演講公告

演講人陳健群   教授

服務單位國立清華大學工程與系統科學系

演講題目Atomic Electron Tomography

演講時間10961(星期一)早上1020

演講地點工綜館203國際演講廳

個人學歷

美國加州大學洛杉磯分校 / 物理學系 / 博士

國立臺灣大學 / 物理學系 / 碩士

國立臺灣大學 / 物理學系 / 學士

個人經歷

國立清華大學 / 工程與系統科學系 / 助理教授

國家實驗研究院 / 儀器科技研究中心 / 助理研究員

國家同步輻射研究中心 / 助理研究員

國立中山大學 / 物理系 / 助理教授

演講摘要

Three-dimensional (3D) imaging and structural determination have played an extremely important role in the evolution of modern science and technology. X-ray crystallography, a 100-year-established method based on the global average of thousands to millions of identical unit cells, remains the only method to determine 3D structures at atomic resolution. However, visualizing local atomic structures within individual samples (e.g., defects and dislocations) has become much more important in modern science due to their capability of dramatically changing the properties of materials. More recently, with advancements of electron microscopy, the alternative methodology, electron tomography (ET), has appeared its great potential to visualize 3D structures of local structures at atomic resolution. By combining state-of-the-art scanning transmission electron microscope (STEM) with high-angle annual dark field (HAADF) detector and a novel tomographic reconstruction technique, known as equally sloped tomography (EST), we have achieved electron tomography at atomic resolution and identified all atoms within the nanoparticle. I will introduce the fundamentals of atomic electron tomography and current developments of this technique in Taiwan.

出席學生

僅學號末一碼為奇數同學須出席 (學號末一碼為偶數同學請至CEIBA及NTU COOL線上學習)

20200601-1