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. Author manuscript; available in PMC: 2014 Nov 26.
Published in final edited form as: ACS Nano. 2013 Oct 18;7(11):10.1021/nn4035316. doi: 10.1021/nn4035316

Figure 1.

Figure 1

Characterization of PCPS as a delivery carrier for gene silencing agents. (a) SEM images of oxidized porous silicon (pSi) as the starting material and PCPS as the final product. (b) Changes in zeta potential of particles at various stages of fabrication. Results are presented as the mean of five measurements ± standard deviation. (c) Confocal microscopic images of PCPS/siRNA (left panel) and the released Arg-PEI-siRNA polyplex nanoparticles. Red fluorescence was from the Alexa555-conjugated siRNA. (d) Size distribution of released siRNA polyplex nanoparticles measured by dynamic light scattering. (e) Atomic force microscopic image for size analysis of siRNA polyplex nanoparticle.