69654 20191212100659.0 doi 10.3390/mi9020045 sideral 104612 ART-2018-104612 eng Malankowska, M. Three-dimensional fractal geometry for gas permeation in microchannels 2018 Access copy available to the general public Unrestricted The novel concept of a microfluidic chip with an integrated three-dimensional fractal geometry with nanopores, acting as a gas transport membrane, is presented. The method of engineering the 3D fractal structure is based on a combination of anisotropic etching of silicon and corner lithography. The permeation of oxygen and carbon dioxide through the fractal membrane is measured and validated theoretically. The results show high permeation flux due to low resistance to mass transfer because of the hierarchical branched structure of the fractals, and the high number of the apertures. This approach offers an advantage of high surface to volume ratio and pores in the range of nanometers. The obtained results show that the gas permeation through the nanonozzles in the form of fractal geometry is remarkably enhanced in comparison to the commonly-used polydimethylsiloxane (PDMS) dense membrane. The developed chip is envisioned as an interesting alternative for gas-liquid contactors that require harsh conditions, such as microreactors or microdevices, for energy applications. info:eu-repo/grantAgreement/ES/DGA/EU-EACEA/FPA2011-0014 info:eu-repo/grantAgreement/ES/DGA/EU-EACEA/SGA2012-1719 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.426 2018 INSTRUMENTS & INSTRUMENTATION 25 / 61 = 0.41 2018 Q2 T2 NANOSCIENCE & NANOTECHNOLOGY 55 / 94 = 0.585 2018 Q3 T2 0.536 2018 Control and Systems Engineering 2018 Q2 Mechanical Engineering 2018 Q2 Electrical and Electronic Engineering 2018 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Schlautmann, S. Berenschot, E.J.W. Tiggelaar, R.M. (orcid)0000-0001-9897-6527 Pina, M.P. Universidad de Zaragoza (orcid)0000-0002-4758-9380 Mallada, R. Universidad de Zaragoza Tas, N.R. Gardeniers, H. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 9, 2 (2018), 45 [12 pp] Micromachines (Basel) Micromachines (Basel) 2072-666X 625081 http://zaguan.unizar.es/record/69654/files/texto_completo.pdf Versión publicada 101836 http://zaguan.unizar.es/record/69654/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:69654 articulos driver 2019-12-12-10:03:37 ARTICLE