Supplementary materials

The influence of the electrosynthesis conditions on the spontaneous release of anti-

inflammatory salicylate during degradation of polypyrrole coated iron for

biodegradable cardiovascular stent

Karolina Cysewska  1,*, Jakub Karczewski 2,Piotr Jasiński  1

1 Faculty of Electronics, Telecommunications and Informatics, Gdansk University of

Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland

2 Faculty of Applied Physics and Mathematics, Gdansk University of Technology,

ul. Narutowicza 11/12, 80–233 Gdansk, Poland

Figure A. Linear scan voltammetry of bare iron in 0.1 M sodium salicylate or in 0.1 M

sodium salicylate and 0.1 M pyrrole with a scan rate of 20 mV·s -1 from -0.35 to 1.6 V vs.

Ag/AgCl.

Figure B. Cross-sectional SEM image of PPy coated iron synthesized in the presence of

sodium salicylate with electropolymerization time limited by a charge of 2.11 C·cm-2 (a) and

6.37 C·cm- 2 (b).

Figure C. EDX elemental analysis of PPy coated iron electrosynthesized in aqueous solution

of 0.1 M Py and 0.1 M sodium salicylate.

Figure D. Calibration curves of sodium salicylate.

Figure E. Evolution of the absorbance at 230 nm (a) and concentration of salicylate released

(b) over the immersion time for different electrodeposition charge Qd.

Figure F. Evolution of the absorbance at 230 nm (a) and concentration of salicylate released

(b) over the immersion time for different sodium salicylate concentration.

Figure G. Evolution of the absorbance at 230 nm (a) and concentration of salicylate released

(b) over the immersion time for different pyrrole concentration.

Figure H. Linear approximation of concentration of salicylate released vs. immersion time (t)

for 1 ≤ t ≤ 2 (a), 5 ≤ t ≤ 9 (b) and 15 ≤ t ≤ 21 (c) (different sodium salicylate concentration).

Figure I. Linear approximation of concentration of salicylate released vs. immersion time (t)

for 1 ≤ t ≤ 2 (a), 5 ≤ t ≤ 9 (b) and 15 ≤ t ≤ 21 (c) (different deposition charge).

Figure J. Linear approximation of concentration of salicylate released vs. immersion time (t)

for 1 ≤ t ≤ 2 (a), 5 ≤ t ≤ 9 (b) and 15 ≤ t ≤ 21 (c) (different pyrrole concentration).