Visible Light Assisted Organosilane Assembly on Mesoporous Silicon Films and Particles.

摘要: Porous silicon (PSi) is a versatile matrix with tailorable surface reactivity, which allows the processing of range multifunctional films and particles. The biomedical applications PSi often require capping organic functionalities. This work shows that visible light can be used to catalyze assembly organosilanes on PSi, as demonstrated two organosilanes: aminopropyl-triethoxy-silane perfluorodecyl-triethoxy-silane. We studied process related (PSiFs), were characterized by X-ray photoelectron spectroscopy (XPS), time flight secondary ion mass (ToF-SIMS) field emission scanning electron microscopy (FESEM) before after plasma patterning process. analyses confirmed oxidation anchorage organosilane backbone. further highlighted analytical potential 13C, 19F 29Si solid-state NMR (SS-NMR) compared Fourier transformed infrared (FTIR) in characterization functionalized particles (PSiPs). reduced invasiveness organosilanization regarding PSiPs morphology was using transmission (TEM) FESEM. Relevantly, results obtained complemented those PSiFs. SS-NMR suggests number siloxane bonds between PSiPs, does not reach levels maximum heterogeneous condensation, while ToF-SIMS suggested certain degree polymerization. Additionally, differences among carbons (non-hydrolyzable) functionalizing groups are identified, especially case perfluorodecyl group. spectroscopic propose mechanism for activation assembly, based initial photoactivated matrix.