GPC results of PCL exhibited polymeric species having broad molecular weight distribution due to the chain-growth nature of the polymerization reaction. GPC traces of PEDOT, on the other hand, revealed the formation of much larger molecular weight species with a dispersity of Đ = 1.35, which is close to the previous step-growth polymerization results of other electron-donor monomers such as N-ethylcarbazole , N-methylpyrrole, and Nmethylindole . GPC traces of the PEDOT-PCL scaffold indicated the presence of polymers having average-molecular weight Mn closer to PCL's with slightly lower dispersity. From these data, it is possible to comment that the introduction of ECL interfered with the formation of high Mn PEDOT species. Bulk photopolymerization's conversion is relatively low, possibly due to the high viscosity resulting in low mobility and due to low penetration of the light at 415 nm. The lower Mn obtained in the bulk system can be attributed to the diminished efficiency of the PAB photoinitiator under visible light irradiation, as this was previously observed in the photopolymerization of EDOT. 1 H NMR (Fig. ) and C NMR (Fig. ) spectra of the scaffold confirmed the presence of both polymers (PCL and PEDOT) inside the scaffold. All the peaks corresponding to PCL are in accordance with the literature . The additional peak at 4.12 ppm belongs to the methylene group (-CH2) of ethylenedioxy moiety of PEDOT units. The absence of any significant aromatic peaks manifests the successful polymerization of EDOT. Photochemically synthesized pristine PEDOT was not soluble in CDCl3, however, the spectrum taken in DMSO-d6 solvent, contained one broad peak centered at 4.45 ppm (Fig. ). Neglecting the solubility problems of PEDOT in chloroform, using the integrals from 1 H NMR, ~30% of PEDOT content is estimated in the scaffold. Following structural characterization by standard spectroscopic and chromatographic methods (IR, NMR, and GPC), surface morphology and topology of the homopolymers and scaffold were explored using scanning electron microscopy (SEM) (Fig. ) and transmission electron microscopy (TEM) (Fig. ), respectively. Fig. shows SEM micrographs of PCL, PEDOT, and PEDOT-PCL scaffold. Visual inspection of the images revealed that PCL displayed flake-like aggregates of crystals, while pristine PEDOT displayed a bulky amorphous morphology due to the stacking of the thiophene rings, restricting its use in many applications. On the other hand, the micrograph of the scaffold exhibited drastic differences and disclosed a spongy and interconnected nanoporous micelles morphology with pore sizes varying between 100-900 nm. An interconnected network is a desired feature for the possible cell migration within the scaffold . Additionally, during SEM measurements, the PEDOT-PCL scaffold didn't require any Pt/Au coating which could be attributed to its electroconductivity which is later discussed. Based on SEM images, we can conclude that the incorporation of PCL into PEDOT, avoided the agglomeration of the aromatic units, resulting in a peculiar surface that resembles to the surface of the previously fabricated thiophene-containing PCL scaffolds. Furthermore, using energy dispersive x-ray spectroscopy (EDS) (Fig. ), we calculated a ~25-30% PEDOT content (by comparing S to C ratio), which was close to the content calculated using NMR integrals. Fig. shows TEM micrographs of dilute ethanol dispersions of all the polymers with a 100 nm magnification. PCL exhibited round-like irregular-size nanoparticles (20-50 nm). PEDOT, similar to its SEM micrograph, was agglomerated through stacking, resulting in a micron-sized bulky topology. As observed in the SEM micrograph of the scaffold, the chemical incorporation of PCL to PEDOT caused a remarkable change that can be seen in the scaffold's TEM micrograph, disclosing a self-assembled micellar system containing spherical particles with scattered sizes. Micellar systems are known to exist mostly in polymeric species containing both hydrophilic and hydrophobic moieties . Nonetheless, both PEDOT and PCL are considered hydrophobic polymers . To investigate the hydrophobicity of all the synthesized polymers (PCL, PEDOT, and PEDOT-PCL), water contact angle measurements were conducted (Fig. ).