The aim of this project is to investigate the applicability of nanoparticles/ionic liquid composites as novel protective lubricating films for metal wear parts. Either nanoparticles or ionic liquids separately have been shown to exhibit exceptional lubricating qualities; however, the combinations of the two have never been demonstrated. We propose that the combination can significantly reduce the main obstacle that hinders wide-spread application of tribological nanoparticles – long-term instability in suspensions (e.g. oil suspensions), and clustering of the particles. In addition, the combination can also widen the range of applications, e.g. dry tribological coatings, much wider temperature range, and preserved functionality at harsh conditions where oil-based lubricants fail etc. The project activities will be divided in two major directions: 1) synthesis of the suitable nanoparticles and ionic liquids, and 2) preparation of the stable mixtures and studies of their tribological behavior, including theoretical modeling of the processes. Also, the tribological behavior of the nanoparticles/ionic liquid combinations in conventional lubricating oils will be characterized.