Abstract The bimolecular layer composed of cobalt phthalocyanine (CoPc) and hexadecafluoro copper phthalocyanine (F16CuPc) deposited at room temperature on Ag(100) was investigated by scanning tunneling microscope. The coexistence of ordered bimolecular chessboard-like structure with 2D molecular gas phase is observed after deposition 0.7 ML of CoPc and 0.1 ML F16CuPc. The 2D gas phase contains mostly CoPc molecules. In the ordered domains, the CoPc:F16CuPc ratio is about 1.2, i.e. around five and a half times lower than the deposition ratio. The molecular ratio, higher than one, in the chessboard-like structure arises from the substitution of F16CuPc by cobalt compound. A slight increase (up to ca. 1.6) of the molecular ratio is observed close to the border of the ordered domain with CoPc rich 2D gas phase. Almost complete molecular monolayer was prepared by adding about 0.2 ML of CoPc. Thenceforth, the coexistence of chessboard-like bimolecular structure with monomolecular CoPc ordered domains is found. The addition of CoPc does not change the CoPc:F16CuPc ratio assembled in the bimolecular chessboard-like structure.

中文翻译：

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CoPc 和 F16CuPc 双分子层在 Ag(100) 上的 STM 研究

摘要 采用扫描隧道显微镜研究了室温下沉积在Ag(100)上的由钴酞菁(CoPc)和十六氟铜酞菁(F16CuPc)组成的双分子层。在沉积 0.7 ML CoPc 和 0.1 ML F16CuPc 后，观察到有序双分子棋盘状结构与二维分子气相共存。二维气相主要包含 CoPc 分子。在有序域中，CoPc:F16CuPc 比率约为 1.2，即比沉积比率低约五倍半。棋盘状结构中高于1的分子比是由钴化合物取代F16CuPc引起的。在具有富含 CoPc 的二维气相的有序域的边界附近观察到分子比的轻微增加（高达约 1.6）。通过添加约 0.2 毫升 CoPc 制备几乎完整的分子单层。此后，发现了棋盘状双分子结构与单分子CoPc有序结构域的共存。添加 CoPc 不会改变组装在双分子棋盘状结构中的 CoPc:F16CuPc 比率。