Zn and ZnO nanoparticles have been the center of attention due to their unique properties. In this study, Zn and ZnO nanoparticles were fabricated by the novel method of Electormagnetic Leviational Gas Condensation. In order to levitate Zn samples successfully, a 2D computer simulation model was developed to design the appropriate coil geometry. The Zn sample was levitated, melted and finally evaporated. Zinc vapours ascending from the high temperature levitated Zn droplet were condensed by appropriate inert gases under atmospheric and reduced pressures. Effects of gas flow rate, oxygen flow rate, gas temperature, gas type and pressure of the system on the mean particle size, size distribution and morphology of Zn and ZnO nanoparticles were investigated. XRD, SEM, TEM, DLS and Image analysis were used to evaluate crystallinity, morphology and mean size of the particles. The particles synthesized at 1 atm were submicron in size, although increasing gas flow rate of Ar and He-20%Ar led to decrease in the mean particle size. Zn particles synthesized using Ar at 1 atm pressure under flow rates of 10, 20 and 25 lit.min -1 were spherical in shape with the mean size of 793±79.6, 649.3±84.3 and 121.4±4.1 nm, respectively. Zn particles synthesized using He-20%Ar gas mixtures at 1 atm pressure under flow rates of 10, 15, 20 and 25 lit.min -1 were spherical in shape with the mean size of 782.3±96.4, 521.1±90, 375.3±150.4 and 199±10.1 nm, respectively. Decreasing temperature of the He-20%Ar gas mixture about 75 degrees led to formation of faceted crystals. This sharp change in morphology from spherical to faceted was attributed to the larger degree of supersaturation and entropy change. Condensation of Zn particles at reduced pressure resulted in formation of smaller particles. Zn particles synthesized at 460, 380 and 300 mmHg using Ar as a carrier gas were spherical in shape with the mean sizes of 130.9±4.0, 110.5±7.7 and 107.2±5.2 nm, respectively. The mean size of the particles synthesized at 300 mmHg using He-20%Ar gas were 39.5±2.7 nm. A mechasnim was proposed to explain the effect of pressure on the mean particle size. In order to synthesize ZnO nanoparticles, oxygen was introduced into the chamber. The required oxygen to inert gas molar ratio at 1 atm pressure using Ar, He-20%Ar, cooled He-20%Ar and at 330 mmHg using He-20%Ar to synthesize ZnO particles were determined to be 0.12, 0.177, 0.177 and 0.211 respectively. The morphology of ZnO particles at all conditions were nanorods and tetrapods. The mean length of the rods synthesized at 1 atm pressure using Ar, He-20%Ar, cooled He-20%Ar and at 330 mmHg using He-20%Ar were 290.6, 94.48, 78.95 and 82.1 nm, respectively and their mean width of them were 132.36, 54.68, 32,96 and 26.61 nm, respectively. A possible justification was proposed to describe formation of rod-like morphology.
