The conventional lithographic techniques such as e-beam lithography allow one to easy obtain nanostructured pattern systems with a higher degree of order. But this technique is expensive, slow, and not suited for high-volumes production of nanostructures. In this presentation is focus on a novel nanofabrication technique base on self-assembling of polystyrene nanospheres and aimed to obtain magnetic nanodisks suspended in ethanol will be presented[1]. They were selected this technique because the nanosphere lithography was a promising inexpensive fabrication tool for producing regular and homogenous arrays of nanoparticles with different sizes[2].The morphology and magnetic properties were investigated. The final product have lateral dimension around 650 nm and thickness 30 nm. The process end-product can be used as suitabled magnetic carriers having nearly monodispersed size and simultaneously displaying high saturating magnetization and low coercivity. Magnetisation reversal has been studied by room-temperature hysteresis loop measurements in either dot arrays attached on a substrate or in liquid-dispersed free-standing nanodisks. In both samples, the reversal is marked by magnetic vortex nucleation/annihilation. Such a behavior is confirmed for nanodot arrays by measuring magnetic domain configuration, while numerical simulation is used for confirming magnetization reversal process in nanodisks. Therefore, this technique is a new alternative to decrease of the drawback from the conventional techniques.