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. 2015 Oct 6;6:8312. doi: 10.1038/ncomms9312

Figure 2. STM imaging and structure of PTCDA 2D clusters on NaCl(2 ML)/Ag(111).

Figure 2

(a) STM constant-current image (45 × 45 nm2, I=30 pA, Vb=−1.5 V) of PTCDA clusters on NaCl(2 ML)/Ag(111) formed after room temperature annealing. (b,c) STM images of a 12-molecule PTCDA nanoisland (9 × 9 nm2, I=30 pA, (b) Vb=+1.0 V and (c) Vb=−1.5 V). Images at 4.3 K. (d) Structural model of 12-molecule island showing positions on NaCl lattice. (e) Model of the hydrogen bond network within the nanoisland. Partial charges (δ+, δ−) are shown.