Ch3coo 2zn 2h2o

Chitosan of average molecular mass = 300,000 g/mol was purchased from PolAura (Dywity, Poland). Poly (lactic acid), acetone (analytical grade), acetonitrile, trifluoroacetic acid, NaCl, (CH₃COO)₂Zn 2H₂O, NaHCO₃, KCl, K₂HPO₄ 3H₂O, MgCl₂ 6H₂O, KOH, HCl, CaCl₂, chloroauric acid, Na₂SO₄, (CH₂OH)₃CNH₂, methanol, ethanol, XTT assay, L929 mouse fibroblasts cell line, human dermal fibroblasts (HDF) primary cells, fibroblasts complete growth medium (FGM), Dulbecco’s Modified Eagle Medium (DMEM) with high glucose content, phosphate buffer solution (PBS), streptomycin/penicillin, trypsin, and FGF-2/basic FGF Protein were purchased from SigmaAldrich (Poznań, Poland). All other reagents were of analytical grade and purchased from SigmaAldrich.

The graphene oxide (GO) was purchased from Cheaptubes, H ${}_2$ N–C(=S)–NH ${}_2$ , LiNO ${}_3$ and (CH ${}_3$ COO) ${}_2$ Zn·2H ${}_2$ O were purchased by Sigma Aldrich (St. Louis, MO, USA), Ketjenblack (KjB EC-300J) and the poly(vinylidene difluoride) (PVdF) were provided by AkzoNobel and Solvay, respectively.