Line Plot from Scientific Research

STML spectra of NiPc, PtPc, PdPc, and ZnPc on 3 ML NaCl/Ag(111). While NiPc did not show any fluorescence, the other MPc’s exhibited the well-known Q(0,0) fluorescence. The insets show constant-current STM images of the respective MPc molecules, marking positions where the tip was parked for the STML measurements.

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