The Pozzo group studied the hierarchical aggregation P3HT using SANS in different solvents and temperatures, characterizing the evolution of fully dissolved P3HT chains to parallelepipeds and fibril networks. McCulloch et al. was able to use the wormlike chain model to fit P3AT scattering, finding the persistence length to be ~3 nm and decreasing with increasing temperature. While other works were not able to use physical models for the scattering, the presence of semiflexible chains and large aggregation was evident from power law scaling .