Aging of porous silicon in physiological conditions: Cell adhesion modes on scaled 1D micropatterns

The surface properties of porous silicon (PSi) evolve rapidly in phosphate‐buffered saline. X‐ray photoelectron spectra indicate the formation of a Si–OH and C–O enriched surface, which becomes increasingly hydrophilic with aging time. Multiscale stripe micropatterns of Si and PSi have been fabricated by means of a high‐energy ion‐beam irradiation process. These micropatterns have been aged in physiological conditions and used to analyze human...