field-ion microscope


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field-i·on microscope

(fēld′ī′ən, -ī′ŏn)
n.
A microscope that produces images of atoms in resolution at the atomic scale on a sharp, electrically charged, super-cooled metal tip by means of field ionization. Ions repelled from the tip form a pattern on a detector, providing an image of the sample on the tip. Also called ion microscope.
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Using a field-ion microscope that could identify the positions of individual lead atoms in the alloy, he and DeArdo determined the mechanism.
He also predicted that the exchange mechanism would produce a distinctive pattern of sites visited by a diffusing atom, and that this pattern should be apparent in data compiled from field-ion microscope observations.

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