Abstract
Hexagonal boron nitride (h-BN) was grown on Pt(111) and Ru(0001) to serve as a buffer layer for molecular adsorbates. Hydrocarbon lander molecule C64H36 does not exhibit preference for specific h-BN adsorption sites on Pt(111), while on Ru(0001), wire and pore sites of the two-dimensional mesh are favored. The spectroscopic signatures of C64H36 frontier orbitals show a strong dependence on the adsorption site. For h-BN on Pt(111), C64H36 frontier orbital energies exhibit a common shift that leaves the gap between the orbitals invariant and reflects local work function changes of the h-BN lattice the molecule is weakly coupled to. In contrast, h-BN on Ru(0001) leads to a nonuniform behavior of the frontier orbital energies, which is tentatively attributed to additional charge transfer processes between the molecule and the surface.
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Schedule a callMore From: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
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