Nowadays the nanotechnology is pushing hard in almost every direction of the technology. Creating patterns with nanoparticles would be a very useful technique in order to manipulated nanoparticles. Here comes the motivation for this project, the possibility to get a faster an easier way to create layers and patterns using the electrospray technique. The main aim for this project is the construction of an electrospray system for nanoparticles deposition and the characterization of the nanoparticle layers deposited with this system. The necessary equipment to build the electrospray setup is explained and the gold and polystyrene nanoparticles from 100 to 630nm are described. This particles and all the experiments have been characterized with an electronic microscope (SEM-FIB) equipped with and x-ray EDS system from the CRNE. And nally a complete description of the experiments and the layers created with the di erent variations of the electrospray setups.