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

Reversibly Functionalizable Hydrogen Peroxide- Sensitive Asymmetric Nanopores

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 theoretically that the current–voltage curves provide a suitable method to monitor the change of pore surface characteristics induced by H2O2 in solution from the electronic rea...

Sensing with nanopores--the influence of asymmetric blocking on electrochemical redox cycling current.

Nanoporous redox cycling devices are highly efficient tools for the electrochemical sensing of redox-active molecules. By using a redox-active mediator, this concept can be exploited for the detection of molecular binding events via blocking of the redox cycling current within the nanopores. Here, we investigate the influence of different blocking scenarios inside a nanopore on the resulting re...

Diode-like ion track asymmetric nanopores: some alternative methods of fabrication

Carbohydrate-actuated nanofluidic diode: switchable current rectification in a nanopipette.

Nanofluidic structures share many properties with ligand-gated ion channels. However, actuating ion conductance in artificial systems is a challenge. We have designed a system that uses a carbohydrate-responsive polymer to modulate ion conductance in a quartz nanopipette. The cationic polymer, a poly(vinylpyridine) quaternized with benzylboronic acid groups, undergoes a transition from swollen ...

Field effect modulated nanofluidic diode membrane based on Al2O3/W heterogeneous nanopore arrays