Dependence of semiconductor nanoparticle size on spray condition in electro-spray deposition method

Semiconductor nanoparticles whose sizes were below 10 nm were fabricated by electro-spray deposition (ESD) method for a simple and dry printing process. We evaluated the particle size relation with the spray conditions. We found that the ZnS particle sizes were related with the solution flow rate. Calculated particle diameter from semi-theoretical analysis corresponded well with the experimental results. The minimum particle size reached to 9.8 nm. These results indicated the controllability of particle diameter by the spray condition and the possibility of the spray process to produce nanoparticles which exhibits the quantum confinement effect.