FULLERENES ADSORPTION ONCu(111) ANDAg(111) SURFACES

T. Hashizume and T. Sakurai
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T. Hashizume: Institute for Materials Research (IMR), Tohoku University, Sendai 980–77, Japan
T. Sakurai: Institute for Materials Research (IMR), Tohoku University, Sendai 980–77, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 905-913

Abstract: Initial stage adsorption and film growth ofC60,C70,C60(x)C70(1−x), andSc2@C84fullerene molecules onCu(111) andAg(111) surfaces have been investigated by field-ion scanning tunneling microscopy. Fullerene molecules are mobile on the terrace and initially segregate to the step edges. A well-ordered monolayer films form with a close-packed arrangement upon annealing the fullerence-covered surfaces. The(4×4)phases form in the case of theC60,C70, andC60(x)C70(1−x)adsorption on theCu(111)-(1×1)surface, indicating a strong interaction between theCusubstrate and fullerenes. Intramolecular structures of theC60andC70molecules are observed and interpreted as the mappings of the local electron density of states. On theAg(111) surface,C60andSc2@C84monolayer films show several phases that have almost identical nearest neighbor distance but are rotated from each other, indicating weaker interaction between theAgsubstrate and fullerenes compared with the case ofCu.

Date: 1996
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DOI: 10.1142/S0218625X96001637

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