A variety of nanomaterials have been developed in last few years with interesting physico-chemical properties. Most of the attempts so far have been to gain understanding of this new class of materials and look for potential applications. This has lead to the formulation of some scaling laws to explain, reasonably well, the properties of nanomaterials. It is realized, however, that the nanomaterials are often too difficult to handle due to their chemical, thermal etc instabilities as well as

more »

... llness. There is now a growing interest to integrate nanoparticles with microparticles to get advantages of both the nano and micro world of materials.The synthesis and characterization of ZnO, CdSe, TiO 2 and SiO 2 nano to micro particles and about core-shell particles have been studied.