Dynamic light scattering (DLS) measurements were carried out with a Malvern Zetasizer Pro spectrometer using a He-Ne laser at 633 nm in backscattering mode at a 173° angle. These measurements were performed at 25 °C using 10 mm × 10 mm fluorescence quartz cells. The solvents used for the washing of glassware and the water used for the preparation of NaDC solutions were filtered using 0.2 μm syringes filters (Hydrophilic Millipore ® PTFE). In order to eliminate dust particles, syringes, sample vials and cuvettes were washed with methanol followed by water. Final solutions containing NaDC and OTPh or P3HTwere filtered through 0.45 μm syringes filters (nylon Basix™). The samples were kept at rest overnight before the measurements were performed to allow for the sedimentation of any remaining dust. For each independent experiment, 10 runs were acquired. For the data analysis, the viscosity assumed was that of water and the generalpurpose method in the ZS Xplorer 2.01 software from Malvern Panalytical Ltd was used.