| Issue |
MATEC Web Conf.
Volume 98, 2017
16th International Conference on Organized Molecular Films (ICOMF16-LB16)
|
|
|---|---|---|
| Article Number | 03001 | |
| Number of page(s) | 4 | |
| Section | Self-assembled monolayers | |
| DOI | https://doi.org/10.1051/matecconf/20179803001 | |
| Published online | 08 February 2017 | |
Phosphonate molecular layers on TiO2 surfaces
1 Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, Genova, Italy
2 Dipartimento di Fisica and OPTMATLAB, Università di Genova, Via Dodecaneso 33, Genova, Italy
3 INFN, Sezione di Genova, Via Dodecaneso 33, Genova, Italy
* Corresponding author: cavalleri@fisica.unige.it
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.
© The Authors, published by EDP Sciences, 2017
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