Chemistry: A Molecular Approach Chapter 2 Atoms and Elements

Roy Kennedy Massachusetts Bay Community College Wellesley Hills, MA

Gerd Bennig and Heinrich Rohrer found that as you pass a sharp metal tip over a flat metal surface, the amount of current that flows varies with distance between the tip and the surface Measuring this “tunneling” current allowed them to scan the surface on an atomic scale – essentially taking pictures of atoms on the surface

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