We find that C59N exists as a monomer on Si(111) and Si(100) surfaces, in contrast to the dimerized state ((C59N)2) it adopts in the bulk azafullerene solid. A combination of scanning tunnelling microscopy, photoelectron spectroscopy and X-ray absorption measurements indicates that, as for C60, the chemical bond between C59N and the Si(111)-(7×7) surface involves the formation of covalent Si-C bonds. We argue that the strong C59N-surface interaction on both Si(111) and Si(100) precludes molecular diffusion and thus prohibits the formation of dimers. The dominant role of molecule-surface, as opposed to intermolecular interactions is confirmed by scanning tunnelling microscope-based molecular manipulation experiments.
|ジャーナル||Materials Science and Engineering B: Solid-State Materials for Advanced Technology|
|出版ステータス||Published - 2000 5 1|
|イベント||3rd International Conference on Low Dimensional Structures and Devices (LDSD'99) - Antalya, Turkey|
継続期間: 1999 9 15 → 1999 9 17
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