| AVS 56th International Symposium & Exhibition | |
| Surface Science | Monday Sessions |
| Session SS1-MoM |
| Session: | Vibrational Spectroscopy and Surface Reactions |
| Presenter: | R. Franking, University of Wisconsin, Madison |
| Authors: | R. Franking, University of Wisconsin, Madison H. Kim, University of Wisconsin, Madison E.C. Landis, University of Wisconsin, Madison S.A. Chambers, Pacific Northwest National Laboratory R.J. Hamers, University of Wisconsin, Madison |
| Correspondent: | Click to Email |
The integration of molecular systems with TiO2 is of interest in a wide range of emerging applications; however, most methods currently used are not stable under in aqueous media, especially at elevated temperatures or extremes of pH. We demonstrate that well-defined molecular layers can be covalently bound to the surface of nanocrystalline and single-crystal anatase TiO2 by photochemically grafting organic molecules bearing a terminal vinyl group. Stability tests on nanocrystalline films show the layers have excellent stability in aqueous environments with a wide range of pH for time scales approaching 2 months, and that grafting occurs through the thickness of 10 micron thick porous films. XPS, FTIR, and wavelength-dependent excitation experiments have been performed to help identify the reaction pathway. New methods are being developed using the highly stable chemistry to create highly flexible, modular interfaces with the oxide.