 Wolf construction offers a simple method of predicting the equilibrium shape of nanoparticles given the surface energies of the material. Recent extensions include active sites of metal nanoparticles for heterogeneous catalysis, ligand-protected nanoparticles generated as colloidal suspensions and nanoparticles of complex metal hydrides for hydrogen storage. This article was authored by Georgios de Barmparis, Zbigniew Lodziana, Nurya Lopez, and others.