Observation of C60 cage opening on Si(111)-(7×7)
Authors:
- 12 July 1993
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 63 (2) , 150-152
Abstract
The ‘‘opening’’ of C60 on Si(111)-(7×7) has been directly observed by scanning tunneling microscopy and correlated with Auger electron spectroscopy (AES) and temperature-programmed desorption spectroscopy. Isolated C60 clusters are observed on Si(111)-(7×7) after annealing the surface to 620 K. Annealing the surface to 1020 K causes the C60 cages to open and thereby cover more of the surface. Also evident is that the opened clusters agglomerate on the surface. The opening of the C60 cage is correlated with an increase in the amount of silicon—carbon bonding and with the increase in the carbon-to-silicon AES peak height ratio with increasing annealing temperature. The ratio increases since the opened cages cover more of the substrate silicon atoms, reducing AES emission from the substrate.Keywords
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