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7/21/2019 Scanning Electron Microscopy-bio
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Scanning electron microscopy
Katedra experimentlnej fyziky
FMFI UKB r a t i s l a v a
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History
1897 - Discovery of the electron ( J. J. Thompson)
1924 - Particle and wave theory (L. deBroglie)
1926 - Electromagnetic lens (H. Busch)
1927 - Demonstration of electron diffraction (C. J.
Davisson and L. H. Germer) 1929 - Theoretical description of SEM (H. Stintzing)
1932 - Construction of first electron microscope(transmission) (M. Knoll and E. Ruska)
1935 - Demonstration of scanning electron
microscope theory (M. Knoll) 1938 - First SEM constructed (M. von Ardenne)
1939 - First commercial transmission electronmicroscope (B. von Borries and E. Ruska)
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History
1942 - Production of electrostatic lens SEM (V. K.Zworykin, J. Hillier and R. L. Synder)
1956 - Production of electromagnetic lens SEM (K. C.A. Smith)
1956 - X-ray microanalyzer with a scanning probe (V.E. Cosslett and P. Duncomb)
1960 - Improved secondary electron detector (T. E.Everhart and R. F. M. Thornley)
1960's - First commercial SEM (CambridgeInstrument Co., Ltd.)
1971- Construction of a STEM with a field emissionsource (A. V. Crewe and J. Wall)
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Physics
Electron interaction with sample
Electron energy spectrum
Electron
core electron interaction
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Electron interaction with sample
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Electron energy spectrum
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Electron core electron interaction
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Technics
Vacuum chamber
Electron optics
Image formation Electronics
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Tubus VEGA
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Electron gun
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Cathode
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Electromagnetic lens
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Detectors
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Image formation
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Image modes
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Image modes
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Image modes
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SEM VEGA TS5136MM
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Image Gallery
Poppy seed
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Image Gallery
Leaf of nettle with beetle
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Image Gallery
Fly head
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Image Gallery
Ant head
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Image Gallery
Ant feeler