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Browsing by Author "Ensinger, Wolfgang"

Now showing items 1-12 of 12

A redox-sensitive nanofluidic diode based on nicotinamide-modified asymmetric nanopores

Ali, Mubarak; Ahmed, Ishtiaq; Ramirez Hoyos, Patricio; Nasir, Saima; Mafe, Salvador; Niemeyer, Christof M.; Ensinger, Wolfgang (Elsevier, 2017-03)

[EN] We demonstrate a redox-sensitive nanofluidic diode whose ion rectification is modulated by the oxidation and reduction of chemical moieties incorporated on its surface. To achieve this goal, we have first synthesized ...
Calcium binding and and ionic conduction in single conical nanopores with polyacid chains: model and experiments

Ali, Mubarak; Nasir, Saima; Ramirez Hoyos, Patricio; Cervera, Javier; Mafe, Salvador; Ensinger, Wolfgang (American Chemical Society, 2012)

Calcium binding to fixed charge groups confined over nanoscale regions is relevant to ion equilibrium and transport in the ionic channels of the cell membranes and artificial nanopores. We present an experimental and ...
Concatenated logic functions using nanofluidic diodes with all-electrical inputs and outputs

Gómez Lozano, Vicente; Ramirez Hoyos, Patricio; Cervera, Javier; Ali, Mubarak; Nasir, Saima; Ensinger, Wolfgang; Mafé, Salvador (Elsevier, 2018)

[EN] Nanopore-based logical schemes in ionic solutions typically involve single gates and chemical inputs. The design of computer-like functions requires the consecutive concatenation of several gates and the use of ...
Electrical network of nanofluidic diodes in electrolyte solutions: Connectivity and coupling to electronic elements

Gómez Lozano, Vicente; Cervera, Javier; Nasir, Saima; Ali, Mubarak; Ensinger, Wolfgang; Mafe, Salvador; Ramirez Hoyos, Patricio (Elsevier, 2016-01)

[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 ...
Fluoride-induced modulation of ionic transport in asymmetric nanopores functionalized with "caged" fluorescein moieties

Ali, Mubarak; Ahmed, Ishtiaq; Ramirez Hoyos, Patricio; Nasir, Saima; Cervera, Javier; Niemeyer, Christof M.; Ensinger, Wolfgang (The Royal Society of Chemistry, 2016)

[EN] We demonstrate experimentally and theoretically a nanofluidic fluoride sensing device based on a single conical pore functionalized with "caged" fluorescein moieties. The nanopore functionalization is based on an ...
Information processing with a single multifunctional nanofluidic diode

Ramirez Hoyos, Patricio; Ali, Mubarak; Ensinger, Wolfgang; Mafe, Salvador (American Institute of Physics, 2012)

[EN] We show that a multifunctional nanofluidic diode, based on a single pH-sensitive polymeric pore, can be used for different information processing tasks. This fact should permit a significant simplification of the logic ...
Lithium Ion Recognition with Nanofluidic Diodes through Host-Guest Complexation in Confined Geometries

Ali, Mubarak; Ahmed, Ishtiaq; Ramirez Hoyos, Patricio; Nasir, Saima; Mafé, Salvador; Niemeyer, Christof; Ensinger, Wolfgang (American Chemical Society, 2018)

[EN] The lithium ion recognition is receiving significant attention because of its application in pharmaceuticals, lubricants and, especially, in energy technology. We present a nanofluidic device for specific lithium ion ...
Logic Functions with Stimuli-Responsive Single Nanopores

Ramirez Hoyos, Patricio; Cervera Montesinos, Javier; Ali, Mubarak; Ensinger, Wolfgang; Mafé, Salvador (John Wiley & Sons, 2014)

[EN] We present the concept of logic functions based on a single stimuli-responsive nanopore and analyze its potential for electrochemical transducers and actuators. The responsive molecules at the surface of the polymeric ...
Nanopore charge inversion and current-voltage curves in mixtures of asymmetric electrolytes

Ramirez Hoyos, Patricio; Manzanares, José Antonio; Cervera Montesinos, Javier; Gómez Lozano, Vicente; Ali, Mubarak; Pause, Isabelle; Ensinger, Wolfgang; Mafé, Salvador (Elsevier, 2018)

[EN] We consider the screening of the negative charges (carboxylic acid groups) fixed on the surface of a conical-shaped track-etched nanopore by divalent magnesium (Mg2+) and trivalent lanthanum (La3+). The experimental ...
Optical gating of photosensitive synthetic ion channels

Ali, Mubarak; Nasir, Saima; Ramirez Hoyos, Patricio; Ahmed, Ishtiaq; Nguyen, Quoc Hung; Fruk, Ljiljana; Mafe, Salvador; Ensinger, Wolfgang (Wiley-VCH Verlag, 2012)

4-oxo-4-(pyren-4-ylmethoxy) butanoic acid is used as a photolabile protecting group to show the optical gating of nanofluidic devices based on synthetic ion channels. The inner surface of the channels is decorated with ...
Optimizing Energy Transduction of Fluctuating Signals with Nanofluidic Diodes and Load Capacitors

Ramirez Hoyos, Patricio; Cervera Montesinos, Javier; Gómez Lozano, Vicente; Ali, Mubarak; Nasir, Saima; Ensinger, Wolfgang; Mafé, Salvador (John Wiley & Sons, 2018)

[EN] The design and experimental implementation of hybrid circuits is considered allowing charge transfer and energy conversion between nanofluidic diodes in aqueous ionic solutions and conventional electronic elements ...
Single cigar-shaped nanopores functionalized with amphoteric amino acid chains: experimental and theoretical characterization

Ali, Mubarak; Ramirez Hoyos, Patricio; Nguyen, Hung Quoc; Nasir, Saima; Cervera, Javier; Mafe, Salvador; Ensinger, Wolfgang (American Chemical Society, 2012)

We present an experimental and theoretical characterization of single cigar-shaped nanopores with pH-responsive carboxylic acid and lysine chains functionalized on the pore surface. The nanopore characterization includes ...