The invention relates to nanocrystals, containing one or more metals as defined in the specification; having a size of 2 to 200 nm; having a defined, three-dimensional polyhedral structure, optionally functionalized by ligands andor embedded crystals. Another exemplary method includes calling for delivery of electrical energy to cells destined for implantation in the body or cells already implanted in the body. Hydrophobic glass substrate thus obtained and its application, in particular as glazing. The method also comprises extrapolating one or more replacement frames based upon the first preliminary time lag and the scaling factor. The first longitudinal support is disposed between the cylinder mount and a second frame cross member. The maximum angle is greater than 90.