“…Among the best-known methods are the following: the crystal cleavage method, the dispersed powder dissolution method, the "neutral" droplet method, the multiphase equilibrium method, the growth and evaporation steps method, the "healing" scratch method, and, finally, the zero creep method [4]. Surface energy may also be evaluated by the measurement of electronic work function [18,19]. However, the analysis of these methods shows that they are not applicable to the measurement of surface energies of small particles.…”