The corrugated moiré structure of a graphene/Ru(0001) interface significantly modulates the growth behavior of pentacene. Molecules preferentially reside on fcc regions, and subsequently occupy hcp regions. DFT calculations show that the dispersed and selective adsorption behavior of pentacene on G/Ru at low coverage is controlled by the adsorption energy of molecules on the substrate. Moreover, by controlling the deposition rate and substrate temperature, the self-assembled structure changes from disorder, local order to long-range order.
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