A facile template-free chemical synthesis of poly(thionine) nanowires

► A simple and template-free chemical synthesis of poly(thionine) nanowires (PTHNWs). ► PTHNWs are formed by the successive oxidation of monomer or oligomeric units. ► They are formed through secondary amino-bridging and contain free amine groups. ► It's electrochemical activity implies a promising applications in biosensors.