PPT-Introduction to Electron

Energy Loss Spectroscopy Xiaozhe Zhang 10312014 Electron Energy Loss Spectroscopy Inelastic scattering is a fundamental scattering process in which the kinetic energy of an incident particle is not conserved in contrast to elastic scattering. 1 domaindomain= any electron pair, or any double or triple bond is = any electron pair, or any double or triple bond is considered one domain.considered one domain.lone pair 2 domains on central a Introduction to scanning electron microscopy. The aims of this course are:. ● . to introduce the principles of scanning electron microscopy. ● . to describe the components of the microscope and explain how they work. (AES). 1. Brief History. Auger . E. ffect discovered in 1920’s. Meitner published first journal. Auger transitions . considered noise at first. 1953-JJ Lander. Characterization of solids today. 2. Three Steps of Auger Electron Spectroscopy. Jim Atherton. Development of Light Microscope. 1590 Hans Zacharias Janssen. 1660 Robert Hook. Onserved. . cells (cork). 1. Klein, Aaron E. The Electron Microscope: A Tool of Discovery. New . Y. ork,McGRaw. Shielding and Penetration. Orbitals with radial probability closer to the nucleus are more . penetrating. . . The closer, more penetrating orbitals, are . shielding. the further orbitals from the nucleus. . “The most incomprehensible thing about the world is that it is comprehensible.”. – . Albert Einstein. Day. 18, 3/31:. . Questions? . Electron Diffraction. Wave packets and uncertainty. Next Week:. Lewis Dot Structures. Learning Objectives. Express the arrangement of electrons in atoms . using Lewis . valence electron dot structures. Electron Arrangements. Valence electron. – an electron in an atom’s highest occupied energy level. Chelsea Aitken. Peter Aspinall. http://www.zyvexlabs.com/EIPBNuG/EIPBN%20images/05Ion.jpg. Intro to Electron Microscopy. Similar to optical microscopy except with electrons rather than photons. Used to image samples with a resolution of 10 Å. Jeffrey. Thorin. Daniel. JJ Thompson. Discovered the electron. Wrote books on atomic theory and structure. First to suggest that atoms have parts. Robert Millikan. Found the accurate way to decide the charge carried with an atom. Kenji Yoshida. 1. , Shoji Torii. 2. . on behalf of . the PPB-BETS collaboration. 1. Shibaura Institute of Technology, Japan. 2. Waseda University, Japan. March 3, 2010. 2. HEAD 2010. Side view of the detector. By Austin Avery. Overview. What is Transmission Electron Microscopy?. History of TEM. Theory of TEM. The instrumentation. How is TEM useful?. Pros/Cons. Summary. Transmission Electron Microscopy. TEM is an instrumental technique that uses a tiny focused beam of electrons.. Tutor: Peter Harris. Click on the buttons to move between slides. .. (Make sure you are in “Slide Show” mode). The aims of this course are:. ● . to explain how X-rays are generated in the electron microscope. Electron Shells. Periods on the periodic table are similar because they have the same number of electron shells.. Within these shells there are layers called sublevels', a shell can have between 1 and 4 sublevels.. Three rules:. electrons fill orbitals starting with lowest n and moving upwards;. The order is: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d etc.. Orbital Diagram. The . electron configuration. of an atom is a shorthand method of writing the location of electrons by sublevel..