Structural and optical modifications of the Ag2WO4/CoPc nanocomposite for potential applications A. Sreedevi, K. P. Priyanka, K. K. Babitha, O. P. Jaseentha and Thomas Varghese Eur. Phys. J. Plus, 131 1 (2016) 7 Published online: 13 January 2016 DOI: 10.1140/epjp/i2016-16007-9