Fabrication of ZnO QD’s for visible light emission applications, surface modulation for stability in dispersions and defect control at the surface is vitally important. Therefore long alkyl chain group (e.g. oleate) and biological molecule cysteine were used together with sol-gel chemistry as vectors to regulate reactivity of the ZnO QD’s and their visible light emission. Additionally, using different ligand concentrations and reaction conditions, semiconductor nanostructures of unusual geometrical shapes were synthesized and characterized. Hexagonal crystal growing habit of ZnO provided unusual geometrically distorted examples of the same geometry that have not been reported so far in the literature. Furthermore, TiO2 nanostructures with significant absorption in visible range of the solar spectrum were obtained by hot injection method and rapid injection and decomposition of Ti-precursor and amine enabled to produce self assembled ball like and multibranched structures with remarkable visible range absorption.

Osman Arslan was born in Saruhanli, Turkey at 1980. He has completed his Bachelor (2001) and Master (2004) work about Nanocomposites and Functional Surface Coatings in Akdeniz University Chemistry Department. In 2006 he has joined to Inorganic Chemistry Institute-TU Graz and later Inorganic and Material Chemistry Institute-University of Cologne (2009) for the Ph.D. studies. During his Ph.D. thesis he focused on the hot injection and thermal decomposition methods for the anisotropic nanoparticle/quantum dots, surface modification and nanomaterial applications.