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Controlled Atomic Doping of a Single C60 Molecule

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Science  09 Apr 2004:
Vol. 304, Issue 5668, pp. 281-284
DOI: 10.1126/science.1095069

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Abstract

We report a method for controllably attaching an arbitrary number of charge dopant atoms directly to a single, isolated molecule. Charge-donating K atoms adsorbed on a silver surface were reversibly attached to a C60 molecule by moving it over K atoms with a scanning tunneling microscope tip. Spectroscopic measurements reveal that each attached K atom donates a constant amount of charge (∼0.6 electron charge) to the C60 host, thereby enabling its molecular electronic structure to be precisely and reversibly tuned.

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