부산대학교 도서관

Adsorption, stability, and organization kinetics of organophosphonicacids on single-crystalline alumina surfaces were investigated bymeans of atomic force microscopy (AFM)-based imaging, nanoshaving,and nanografting. AFM friction and phase imaging have shown that chemicaletching and subsequent annealing led to heterogeneities on single-crystallinesurfaces with (0001) orientation. Self-assembly and stability of octadecylphosphonicacid (ODPA) were shown to be strictly dependent upon the observedheterogeneities of the surface termination, where it was locally shownthat ODPA can loosely or strongly bind on different terminations ofthe crystal surface. Organization kinetics of ODPA was monitored withnanografting on (0001) surfaces. Supported by measurements of surfacewettability and diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS), it was demonstrated that the lack of organization withinthe protective adsorbed hexylphosphonic acid (HPA) monolayer on aluminasurfaces facilitated the reduced confinement effect during nanografting,such that kinetics information on the organization process of ODPAcould be obtained. [ABSTRACT FROM AUTHOR]