Electron optics of transmission electron microscope Lanting Zhang School of Materials Science and Engineering. SJTU lantingzh@sjtu.edu.cn Incld.specimen preparation
Electron optics of transmission electron microscope Lanting Zhang School of Materials Science and Engineering, SJTU lantingzh@sjtu.edu.cn Incld. specimen preparation 1
Why electron microscope? Robert Hooke(1635-1703) 1 mm 于17世纪晚期设计的显微 Human eyes 镜 10 Eukaryotic cells Eukaryotic cells 10 um Prokaryotic cells Prokaryotic cells 1 um Optical microscope nig's. Viruses 100nm% Viruses Ribosomes Pneumonia 10 nm Proteins 肺炎 Ribosomes 0 1 nm mF Heavy atoms 2 Heavy atoms 100pm 颗微镜底下成串的肺炎链球菊
Why electron microscope? 2 Human eyes Optical microscope Pneumonia 肺炎
From Hooke to Ruska Ernst Ruska 1 mm Nobel prize Human eyes in Physics 100um% 1986 Eukaryotic cells Eukaryotic cells 10 um Prokaryotic cells 5 Prokaryotic cells 1 um Optical microscope 100nm- Viruses Viruses Ribosomes 10 nm Proteins Ribosomes 0 1nm 1938 Vaccinia virus Heavy atoms 牛痘病毒 3 Heavy atoms 100pm
From Hooke to Ruska 3 Vaccinia virus 牛痘病毒 Ernst Ruska Nobel prize in Physics 1986 Human eyes Optical microscope
Why electron microscope? SEM micrographs ·Higher A ceramic specimen 1400X 1400X resolution in EM than you can in○M, 个 2800X TEM HRTEM micrograph micrograph LOM micrographs 四 四
Why electron microscope? • Higher resolution in EM than you can in OM. 4 A ceramic specimen
Why electron microscope? o Correlating morphological image to composition as well structure. Ni Cr 500nm B2 L1,PFZ M23C6 S50h Precipitation at grain boundary in an B=[112y。 5 alumina forming stainless steel
Why electron microscope? • Correlating morphological image to composition as well structure. 5 Ni Cr 500nm S50h B2 L12 M23C6 L12 PFZ Precipitation at grain boundary in an alumina forming stainless steel 𝑩 = [𝟏ഥ𝟏𝟐]γ