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. Author manuscript; available in PMC: 2019 May 6.
Published in final edited form as: ACS Nano. 2018 Oct 4;12(10):10272–10280. doi: 10.1021/acsnano.8b05373

Figure 4. LbL film growth study on PDM.

Figure 4.

(A) Film architecture schematics of (Lys/PAA) LbL film constructed on top of PDM polymer coated silicon wafer at acidic LbL assembly environment. (B) Profilometry measured LbL film thickness growth with the number of (Lys/PAA) bilayers deposited atop PDM. (C) LbL film roughness as a function of numbers of bilayers coated (n = 4). Values are reported as mean ± s.e.m. (D) BCA assay determined Lys drug loading in LbL film with the number of (Lys/PAA) bilayers deposited atop PDM coated silicon wafer (n = 3) after 1 min in vitro incubation in PBS. Values are reported as mean ± s.e.m. (E) Representative scanning electron microscopy images of cross-sections of (Lys/PAA)20,30,40 LbL film constructed on top of PDM coated silicon wafer.