29 LAM 10 International Conference on Lasers, Optics and Photonics in science and technology for sustainable development, organized by the laser atomic, molecular and optical sciences network, Dakar, Senegal, January 2014. African Laser Centre workshop and presented the work entitle "Applications of Nanoparticles in Photodynamic Therapy", organized by the African Laser Centre and University of Stellenbosch, Cape town, South Africa, November 2013. ICTP Advanced School on Synchrotron Radiation Techniques and Nanotechnology, organized by ICTP and iThemba lab, Cape Town, South Africa, November 2013. The first African Summer School on Optics and Applications to Sustainable Development (ASOSD), organized by the optical society of Tunisia, Carthage Hannibal, Tunis, August 2013. The International Symposium in Molecular Plasmonics, organized by the Institute of Photonic Technology, Nano Biophotonics Department, Jena. Germany, May 2013. th The 9 Annual International conference of the Egyptian society of Experimental Biology, Organized by the Egyptian society of experimental biology, Cairo. Egypt, Feb. 2013. Photodynamic Therapy - A Minimally Invasive Approach and Innovation in Health Care for South Africa, th st September