This research has been funded under CONICET Grant No. PIP 11220110100720CO and UNLP Grant No. 11/X680, both from Argentina; FAPESP Grants No. 2012/04870-7 and No. 2013/13275-8 from Brazil; and MINECO projects MAT2013-48054-C2-2-R and MAT2016-76824-C3-3-R from Spain. We acknowledge the technical support from the Scientific-Technical Services of the University of Oviedo (SCT's) and particularly to the Laboratory of Nanoporous Membranes.