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Litografie
( 4 articoli )
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SNOM
( 6 articoli )
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STM
( 6 articoli )
Heinrich Rohrer and Gerd K. Binnig, scientists at IBM's Zurich Research
Laboratory in Switzerland, are awarded the 1986 Nobel Prize in physics
for their work in scanning tunneling microscopy. Binnig and Rohrer were
recognized for developing the powerful Scanning Tunneling Microscopy
technique. They shared the award with German scientist Ernst Ruska,
designer of the first Electron Microscope. STM can form an image of
individual atoms on a metal, semiconductor or other conductive sample
surface by scanning the tip of a needle over the surface at a height of
only a few atomic diameters, so that tunnel current occurs between the
tip and the sample. Main STM techniques are Constant Current and Constant Height modes for "topographic" data acquisition, accomplished by Spectroscopic techniques for "work-function"(barrier height) and "local density of states"(LDOS) profiles acquisition, I(z) and I(V) curves representing chemical and electronic characteristics of surface.
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