Phosphonate molecular layers on TiO2 surfaces

We investigated the deposition of (HO)2-PO-S-(CH2)15-COOH on TiO2. The phosphonate group has been chosen to serve as the anchoring moiety while the carboxylic group can be exploited for further coupling with antibacterial peptides. Native oxide-covered polished Ti samples were used as substrates for...

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Bibliographic Details
Main Authors: Canepa, P, Solano, I, Uttiya, S, Gemme, G, Rolandi, R, Canepa, M, Cavalleri, O
Format: Conference Proceeding
Language:English
Subjects:
Anchoring
Atomic force microscopy
Coupling (molecular)
Deposition
Hydroxyl groups
Molecular chains
Peptides
Photoelectric emission
Spectroellipsometry
Substrates
Titanium dioxide
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Summary:We investigated the deposition of (HO)2-PO-S-(CH2)15-COOH on TiO2. The phosphonate group has been chosen to serve as the anchoring moiety while the carboxylic group can be exploited for further coupling with antibacterial peptides. Native oxide-covered polished Ti samples were used as substrates for the molecular deposition. Previous to deposition, the substrates were plasma-cleaned in order to enrich their surfaces of hydroxyl groups, suitable for phosphonate coupling. The combined analysis of atomic force microscopy, X-ray photoemission spectroscopy and differential spectroscopic ellipsometry measurements indicates the formation of a submonolayer film made of irregular islands, one molecule thick.
ISSN:2274-7214
2261-236X
DOI:10.1051/matecconf/20179803001