The fullerene family is known for its unique properties, facilitating the formation of large, lubricated nano-onions and the fragmentation into small carbon clusters through various processes. In this study, we explore the thermal evolution of C60 islands in Pt(111), focusing on the segregation of C60 islands, the formation of fullerene dimers, and the subsequent development of large graphene sheets. Using non-contact atomic force microscopy and scanning tunneling microscopy, we observed that after annealing at 500 K, the C60 islands showed minimal change compared to their deposition at room temperature. However, at 800 K, pairs of separated C60 dimers appeared which, due to their low mobility, have the potential to transform into graphene quantum dots (GQDs). Further annealing at 900K controlled and refined the quality and dimensions of the graphene patches. This process not only provides an effective method for producing high-quality graphene, but also permits to preserve isolated C60 dimers on the Pt(111) surface, offering valuable insights for advanced synthesis and lubrication applications.

中文翻译：

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化学配位诱导热 Pt 上的富勒烯二聚体 （111）

富勒烯家族以其独特的特性而闻名，可促进形成大的、润滑的纳米洋葱，并通过各种过程碎裂成小碳簇。在这项研究中，我们探讨了 Pt（111） 中 C60 岛的热演变，重点关注 C60 岛的分离、富勒烯二聚体的形成以及随后大石墨烯片的发育。使用非接触式原子力显微镜和扫描隧道显微镜，我们观察到在 500 K 下退火后，与它们在室温下的沉积相比，C60 岛的变化很小。然而，在 800 K 时，出现了分离的 C60 二聚体对，由于它们的低迁移率，有可能转化为石墨烯量子点 （GQD）。在 900K 下进一步退火控制并改进了石墨烯贴片的质量和尺寸。该工艺不仅为生产高质量石墨烯提供了一种有效的方法，而且还允许在 Pt（111） 表面保留分离的 C60 二聚体，为高级合成和润滑应用提供有价值的见解。