[EN] Electrolyte mixtures in aqueous solutions are central to biophysical chemistry and chemical engineering. In many cases, ions are confined to nanoscale volumes with surface electrical charges. Here, we analyze ...
Garcia-Girón, Reineiry Emilio; Linke, Markus; Nesslinger, S.; García Manrique, Juan Antonio(Elsevier, 2017)
[EN] This paper presents a methodology to determine the damage levels of laminate carbon fibre reinforced plastics (CFRP) parts after controlled impacts. These techniques will be used to perform a re-infiltration technique ...
[EN] We study the cation transport against an external concentration gradient (cation pumping) that occurs in conical
nanopores when zero-average oscillatory and white noise potentials are externally applied. This pumping, ...
[EN] The effect of polyamidoamine (PAMAM) dendrimers (generations G0-G3) on the ion transport properties of nanochannels (conical and cylindrical) is studied either by surface functionalization or by addition to the ...
Ramirez Hoyos, Patricio; Cervera, Javier; Manzanares, José A.; Nasir, Saima; Ali, Mubarak; Ensinger, Wolfgang; Mafe, Salvador(American Institute of Physics, 2022-10-14)
[EN] We have studied experimentally the electrical conductance-voltage curves of negatively and positively charged conical nanopores bathed in ionic solutions with monovalent, divalent, and trivalent cations at electrochemically ...
[EN] We consider a nanopore network with simple connectivity, demonstrating a two-dimensional circuit (full-wave rectifier) with ensembles of conical pores acting as nanofluidic diodes. When the bridge nanopore network is ...
[EN] Electrochemical impedance spectroscopy (EIS) constitutes a useful tool in membrane science and technology because it provides valuable structural and functional information. The different arcs observed in the impedance ...
[EN] Ionic selectivity in nanopores is usually based either on steric or charge exclusion mechanisms. By simultaneously incorporating both mechanisms into a functionalized membrane, an improved control over selectivity can ...
[EN] The membrane potential (V-mem), defined as the electric potential difference across a membrane flanked by two different salt solutions, is central to electrochemical energy harvesting and conversion. Also, V-mem and ...
[EN] We experimentally characterize the ionic conduction of single and multipore nanoporous membranes in aprotic organic electrolytes. To this end, soft-etched (SE) membranes with pore diameters in the nanometer range and ...
Ali, Mubarak; Ahmed, Ishtiaq; Nasir, Saima; Ramirez Hoyos, Patricio; Niemeyer, Christof M; Mafe, Salvador; Ensinger, Wolfgang(American Chemical Society, 2015-09)
We describe the fabrication of a chemical-sensitive nanofluidic device based on asymmetric nanopores whose transport characteristics can be modulated upon exposure to hydrogen peroxide (H2O2). We show experimentally and ...
[EN] We design and characterize a nanofluidic device for the label-free specific detection of histamine neurotransmitter based on a metal ion displacement mechanism. The sensor consists of an asymmetric polymer nanopore ...
[EN] Liquid state arrangements of two polymeric membranes with single conical nanopores constitute nanofluidic diodes that allow a rich electrical functionality based on the modulation of individual conductances in aqueous ...
Haider, Muhammad H. Ali; Nasir, Saima; Ali, Mubarak; Ramirez Hoyos, Patricio; Cervera, Javier; Mafe, Salvador; Ensinger, Wolfgang(Elsevier, 2022-01)
[EN] We present the study of osmotic energy harvesting with soft-etched nanoporous polyimide membranes for a wide range of salt concentration differences, ion irradiation fluences, and multipore orientations (parallel or ...
[EN] The surface charge regulation in nanoscale volumes is a subject of wide interest to biological and chemical soft matter systems. Also, electrolyte mixtures with monovalent and divalent ions are commonplace in practical ...
[EN] We describe experimentally and theoretically the concentration-dependent conduction of tetraalkylammonium
(TAA+) cations through a nanofluidic diode fabricated in a polymer membrane via
asymmetric track-etching ...
Ramirez Hoyos, Patricio; Gómez Lozano, Vicente; Cervera, J.; Nasir, S.; Ali, M.; Ensinger, W.; Siwy, Z.; Mafe, S.(The Royal Society of Chemistry, 2016)
[EN] We describe experimentally and theoretically voltage-controlled current loops obtained with nanofluidic diodes immersed in aqueous salt solutions. The coupling of these soft matter diodes with conventional electronic ...