论文信息 - In situ scanning tunneling microscopic study of polymerization of C60 clusters induced by electron injection from the probe tips

In situ scanning tunneling microscopic study of polymerization of C60 clusters induced by electron injection from the probe tips

Polymerization of C60 clusters epitaxially grown on Si(111)-(7×7) substrates was found to be induced by electron injection from the probe tips of scanning tunneling microscopes (STM) as the sample bias was increased from +4.0 to +5.5 V, exhibiting an evolution behavior characterized by an incubation, a linear growth, and a saturation. The incubation time and the growth rate are dependent greatly on the sample site, which is explained by a model taking into account the pre-existing stress as the driving force of the polymerization and the internal stress built up as a consequence of polymerization producing a stress for backward reactions.

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