Construction and characterization of artificial microstuctures, their mechanical and electrical properties, and the response to diverse stimuli have motivated strong research interests. Nanometric objects share characteristics, which are typical for macroscopic objects at the one hand, and for 'molecular' (quantum) objects at the other. Nano machines carry out mechanical movements similar to their macroscopic counterparts, i. e. translation as well as rotation, although their driving forces are of different nature. While gravitational forces are typical only for macroscopic robots, on the nanoscale Stokes resistance and Brownian movement gain importance. The imposition of forces may occur by an external electric field, which interacts with the nano entities. The consideration of their size and real shape of the particle instead of the common ellipsoidal approach in electric field calculations should provide much more accurate results. A theoretical model is developed in this paper to provide a description of electrorotation depending on the size of a cylinder-shaped particle. It is applied in a study of the controlled rotational movement of a short cylindrically formed bioparticle, represented by the natural shape of the Tobacco Mosaic Virus (TMV) immersed in a suspending dielectric medium.
