Surface morphology and potential alterations of silicon and cellulose surfaces induced by culture media.

<p>AFM topography (<b>A</b>-<b>F</b>) and surface potential (SP; <b>G-I</b>) images of the substrate surfaces. (<b>A</b>-<b>C</b>) show topography of pristine silicon (Si), ethyl cellulose (EC) and cellulose acetate (CA) surfaces, respectively; (<b>D</b>-<b>F</b>) illustrates topography of Si, EC and CA surfaces after incubation in PW medium for 24h, respectively; (<b>G</b>-<b>I</b>) present SP images of the surfaces shown in (<b>D</b>-<b>F</b>). Scale bars correspond to 1µm.