The conference highlighting 'NaNaX 2- nanoscience with nanocrystals' took place in Grenoble-Autrans on France, which comprised the topics such as chemical synthesis, shape control, and surface functionalization of nanoparticles. In addition to this, assembly and self-assembly of nanoparticles, optical and magnetic properties of nanoparticles, and its applications in biology, optoelectronics, and magnetic-data-storage media were also included. Improved synthesis method of colloidal nanoparticles offer the possibility to control the shape of the particle and their composition out of more than one unit. It demonstrated that in addition to optical characterization techniques, the electrochemical characterization is an interesting complementary method. It also focused on the intracellular global positioning system (GPS), in which individual molecules are labeled with fluorescent nanoparticles of different colors, so they can be monitored in real time.