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. Author manuscript; available in PMC: 2018 Feb 8.
Published in final edited form as: Adv Mater. 2014 Mar 13;26(18):2782–2787. doi: 10.1002/adma.201306093

Figure 3.

Figure 3

Hydrogel-mediated electrodeposition of PPy films with multiple chemistries and entrapped biomolecules. (A) Cartoon illustration of selective inking of posts on a hydrogel stamp. The optical images on the right show (B) a PPy pattern produced by a stamp on which the posts were alternatively inked with PSS (dashed red circles show the footprint of posts that carried no dopant) and (C) a patterned PPy with Penn State logo design. (D) ATR-FTIR spectroscopy of PPy spots doped with PSS and DBS on the same substrate, as illustrated in the cartoon inset in this panel where different spots of the patterned PPy were doped with: PSS (blue), DBS (red), or ClO 4 (green). (E) EDS of PPy film spots doped with PSS and ClO 4, on the same substrate examined in panel (D). (F) The fluorescence intensity of PPy films with and without biotin (due to binding of labeled-streptavidin) along with their corresponding fluorescence images. The error bars in the bar graph represent standard error of the mean (P < 0.05, N = 8). (G) ATR-FTIR spectroscopy of PPy film with and without entrapped biotin.