The instability of the gel with 45 mM NaDC is consistent with the DLS solution studies in the presence of 50 mM NaDC. For the latter, a high polydispersity was observed and material was lost in the filtration step for DLS sample preparation. In addition, solubilization of monomeric OTPh and P3HT in the NaDC hydrogel led to protection from photodegradation (Figure ), but this protection was less efficient than observed with NaDC aggregates in aqueous solution.