Molecular properties of PTCDA on graphene grown on a rectangular symmetry substrate

Guo, Haojie; Martínez‐Galera, Antonio J.; Gómez‐Rodríguez, José M.

doi:10.1016/j.apsusc.2023.156777

Cited by 3 publications

(2 citation statements)

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“…Graphene/Ir(110) reveals a wave-like pattern with modulation of the electronic properties, promoting the formation of uniaxially aligned sandwichmolecular wires and films, [38,39] whereas the quasi-1D moiré pattern of graphene/Rh(110) did not have a major effect on the ordering of perylenetetracarboxylic dianhydride (PTCDA) molecules. [40] In this work, we show that the self-assembly and molecular orientation of pentacene molecules are guided along distinct directions by deposition on a 1D-patterned hBN monolayer, while the pentacene's pristine electronic properties remain largely unperturbed. The robust hBN template is fabricated by scalable chemical vapor deposition (CVD) growth of hBN on Ir(100).…”

Section: Introductionmentioning

confidence: 78%

“…Graphene/Ir(110) reveals a wave‐like pattern with modulation of the electronic properties, promoting the formation of uniaxially aligned sandwich‐molecular wires and films, [ 38,39 ] whereas the quasi‐1D moiré pattern of graphene/Rh(110) did not have a major effect on the ordering of perylenetetracarboxylic dianhydride (PTCDA) molecules. [ 40 ]…”

Section: Introductionmentioning

confidence: 99%

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Stripe‐Like hBN Monolayer Template for Self‐Assembly and Alignment of Pentacene Molecules

Chesnyak,

Cuxart,

Baranowski

et al. 2023

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Metallic surfaces with unidirectional anisotropy are often used to guide the self‐assembly of organic molecules along a particular direction. Such supports thus offer an avenue for the fabrication of hybrid organic–metal interfaces with tailored morphology and precise elemental composition. Nonetheless, such control often comes at the expense of detrimental interfacial interactions that might quench the pristine properties of molecules. Here, hexagonal boron nitride grown on Ir(100) is introduced as a robust platform with several coexisting 1D stripe‐like moiré superstructures that effectively guide unidirectional self‐assemblies of pentacene molecules, concomitantly preserving their pristine electronic properties. In particular, highly‐aligned longitudinal arrays of equally‐oriented molecules are formed along two perpendicular directions, as demonstrated by comprehensive scanning tunneling microscopy and photoemission characterization performed at the local and non‐local scale, respectively. The functionality of the template is demonstrated by photoemission tomography, a surface‐averaging technique requiring a high degree of orientational order of the probed molecules. The successful identification of pentacene's pristine frontier orbitals underlines that the template induces excellent long‐range molecular ordering via weak interactions, preventing charge transfer.

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Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%