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Transition from three-dimensional to two-dimensional faceting of Ag(110) induced by Cu-phthalocyanine

1997; American Physical Society; Volume: 55; Issue: 3 Linguagem: Inglês

10.1103/physrevb.55.1384

1095-3795

Matthias Böhringer, Richard Berndt, Wolf‐Dieter Schneider,

Block Copolymer Self-Assembly

At submonolayer coverages Cu-phthalocyanine (CuPc) induces faceting of misoriented Ag(110) into three coexisting orientational phases. CuPc-decorated kinks precipitate into an azimuthally rotated facet, while the interaction of CuPc with the remaining kink-depleted steps causes step bunching in a polar transition. Local deviations from the CuPc-induced equilibrium surface morphology are caused by kinetic constraints attributed to the dominating interaction with kinks. At monolayer coverage a rigid molecular superstructure prevents large scale mass transport and allows only for microfaceting.