In2O3 nanocrystals were prepared by injecting In2O3 sols in a coordinating environment at 160° C. In this way an innovative concept has been achieved, based on the use of self-limitating nanoreactors. By a proper control of the synthesis conditions, differently sized nanocrystals were obtained, the smallest having a size of about 3.5 nm. The nanocrystals were purified by thermal treatments and characterized by X-ray diffraction and high-resolution transmission electron microscopy, showing the presence of nanosized In2O3 …