Surface assembly of pyridyl-substituted porphyrins on Au(111) investigated in situ using scanning probe lithography

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Conference Proceeding

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Scanning probe characterizations of porphyrin patterns created by nanografting were used to provide insight for the molecular orientation and surface assembly of porphyrins with pyridyl and phenyl substituents. In-situ AFM provides highly local views of the assembly of pyridyl-substituted porphyrins on surfaces of Au(111). Matrix self-assembled monolayers(SAMs) of n-alkanethiols furnish a molecular ruler for calibrating height measurements. Nanografting can be used for local measurements of the thickness of porphyrin films in situ by comparison with heights of n-alkanethiol nanopatterns. When nanografted, pyridyl porphyrins were found to assemble onto gold directly into an upright configuration, and surface binding is likely mediated through nitrogen-gold chemisorption. © 2010 SPIE.

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Progress in Biomedical Optics and Imaging - Proceedings of SPIE

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