Fig. 3From: Gemcitabine-incorporated polyurethane films for controlled release of an anticancer drugScanning electron microscopic images of the Si-GPU-PU film interface before and after the drug release study. Unfilled voids are seen at the interface before drug release study (a), and separation between the two films increased upon immersion in a phosphate-buffered saline solution for 1 day in the drug-release study (b)Back to article page