Modeling surface energy in porous metallic nanostructures João Paulo Almeida de Mendonça, Maxwel Gama Monteiro Junior, Sidiney de Andrade Leonel and Fernando Sato Eur. Phys. J. B, 91 5 (2018) 88 Published online: 21 May 2018 DOI: 10.1140/epjb/e2018-80655-2