6/18/2013 Aberration-corrected Scanning Transmission Electron Microscopy -A Critical Tool for Nanoscience & Nanotechnology- Acknowledgements Dr. Lawrence Allard of ORNL and Dr. Peter Crozier of ASU for permission to use some of their data. And the use of the TEM/STEM at the John M. Cowley Center for High Resolution Electron Microscopy at Arizona State University. Jingyue (Jimmy) Liu Department of Physics, Arizona State University, Tempe, Arizona 85287, USA; National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences jingyue.liu@asu.edu The 8th Sino-US Symposium on Nanoscale Science & Technology Zhejiang University, Hangzhou, China, 28 June 2013 Outline 1) Brief history of microscope evolution 2) Introduction of electron microscopy techniques & electron microscopes 3) Discussion on lens aberrations, aberration correction (AC), & image resolution 4) Applications of AC-STEM for nano research 5) Recent development The Drive for Better Microscopes SEM Evolution of Microscopes Magnifying glasses & spectacles Evolution of Microscopes and Major Discoveries They were named lenses because they are shaped like the seeds of a lentil (lentils of glass---lenses) The earliest simple microscope was merely a tube with a plate for the object at one end and a lens that gave a magnification < 10 times the actual size---flea glasses 1 1