title: Harnessing plasmon-induced ionic noise in metallic nanopores.
abstract: The ionic properties of a metal-coated silicon nanopore were examined in a nanofluidic system. We observed a strong increase of the ionic noise upon laser light illumination. The effect appeared to be strongly mediated by the resonant excitation of surface plasmons in the nanopore as was demonstrated by means of ionic mapping of the plasmonic electromagnetic field. Evidence from both simulations and experiments ruled out plasmonic heating as the main source of the noise, and point toward photoinduced electrochemical catalysis at the semiconductor-electrolyte interface. This ionic mapping technique described is opening up new opportunities on noninvasive applications ranging from biosensing to energy conversion.
authors: IMEC, Kapeldreef 75, Leuven, Belgium.
authors: Yi
authors: Y
authors: Li
authors: Chang
authors: C
authors: Chen
authors: Sarp
authors: S
authors: Kerman
authors: Pieter
authors: P
authors: Neutens
authors: Liesbet
authors: L
authors: Lagae
authors: Guido
authors: G
authors: Groeseneken
authors: Tim
authors: T
authors: Stakenborg
authors: Pol
authors: P
authors: Van Dorpe
mesh_terms: D015374:Biosensing Techniques / Q000379:methods; D007477:Ions / Q000737:chemistry; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D058608:Nanopores; D049329:Nanostructures / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D020349:Surface Plasmon Resonance
chemical_list: D007477:Ions; D012825:Silicon