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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Sustained, Controlled and Stimuli-Responsive Drug Release Systems Based on Nanoporous Anodic Alumina with Layer-by-Layer Polyelectrolyte

Fig. 2

Schematic representation of the polyelectrolyte layer-by-layer deposition procedure. a NAA pores with positively charged walls after APTES treatment. b PSS deposition by immersing the APTES treated surface. c PAH deposition by immersing the PSS covered substrate. d DOX loading in the swollen PEM film at pH 2.0. e DOX confinement due to the PEM layer contraction at pH 8.0. f DOX releases at different pH media

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