Electrochemistry on a Localized Surface Plasmon Resonance Sensor

Sannomiya, Takumi; Dermutz, Harald; Hafner, Christian; Vörös, János; Dahlin, Andreas

doi:10.1021/la9042342

Cited by 76 publications

(138 citation statements)

References 24 publications

(55 reference statements)

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“…On the other hand, the surface plasmon resonance is a dynamic phenomenon, with electromagnetic fields that penetrate into the metal as defined by the electromagnetic skin-depth, which is ~3-10 nm for Ag and Au at optical frequencies, and an electron mean free path that is larger than the Fermi screening length. Additionally, the plasmon resonance frequency is predominately determined by the electron density of the very outer layer within the optical skin depth of the metal, as reported experimentally (27) and verified by us using FDTD simulations. Therefore, electrostatic arguments suggest that any additional charges will reside near the surface of the nanoparticle, and electrodynamic arguments suggest that only the electron density near the outer surface needs to be increased in order to blue-shift the plasmon resonance.…”

Section: S6 Charge Accumulation Shell Modelsupporting

confidence: 73%

Plasmoelectric potentials in metal nanostructures

Sheldon

Groep

Brown

et al. 2014

Science

218

207

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The conversion of optical power to an electric potential is of general interest for energy applications and is typically obtained via optical excitation of semiconductor materials. We developed a method for achieving electric potential that uses an all-metal geometry based on the plasmon resonance in metal nanostructures. In arrays of gold nanoparticles on an indium tin oxide substrate and arrays of 100-nanometer-diameter holes in 20-nanometer-thick gold films on a glass substrate, we detected negative and positive surface potentials during monochromatic irradiation at wavelengths below or above the plasmon resonance, respectively. We observed plasmoelectric surface potentials as large as 100 millivolts under illumination of 100 milliwatts per square centimeter. Plasmoelectric devices may enable the development of all-metal optoelectronic devices that can convert light into electrical energy.

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Section: S6 Charge Accumulation Shell Modelsupporting

confidence: 73%

Plasmoelectric potentials in metal nanostructures

Sheldon

Groep

Brown

et al. 2014

Science

218

207

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“…This property has resulted in LSPRs being applied to sensing and detection of chemicals, biological agents, phase transitions and chemical reactions [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Localized surface plasmon sensing based investigation of nanoscale metal oxidation kinetics

et al. 2015

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The localized surface plasmon resonance (LSPR) of nanoparticles can be a powerful and sensitive probe of chemical changes in nanoscale volumes. Here we have used the LSPR of silver (Ag) to study the oxidation kinetics of nanoscopic volumes of cobalt (Co) metal. Bimetal nanoparticles of the immiscible Co-Ag system prepared by pulsed laser dewetting were aged in ambient air and the resulting changes to the LSPR signal and bandwidth were used to probe the oxidation kinetics. Co was found to preferentially oxidize first. This resulted in a significant enhancement by a factor of 8 or more in the lifetime of stable Ag plasmons over that of pure Ag. Theoretical modeling based on optical mean field approximation was able to predict the oxidation lifetimes and could help design stable Ag-based plasmonic nanoparticles for sensing applications.

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“…24,25 Polymer nanopores and nanopipettes rectify due to the asymmetric electric potential resulting from the shape and finite surface charges of the pore walls. 4,5,24 Rectification in SiN nanopores results from the gold layer at the membrane surface deposited before FIB drilling, which is characterized by a higher surface charge density in KCl solutions 26 than the SiN pore walls. 11 The hypothesis tested here states that non-equilibrium 1/f noise can potentially result from the dynamics of a nanopore structure.…”

Section: Introductionmentioning

confidence: 99%

Noise Properties of Rectifying Nanopores

Powell

Davenport

et al. 2011

J. Phys. Chem. C

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Ion currents through three types of rectifying nanoporous structures are studied and compared for the first time: conically shaped polymer nanopores, glass nanopipettes, and silicon nitride nanopores. Time signals of ion currents are analyzed by power spectrum. We focus on the low-frequency range where the power spectrum magnitude scales with frequency, f, as 1/f. Glass nanopipettes and polymer nanopores exhibit non-equilibrium 1/f noise, thus the normalized power spectrum depends on the voltage polarity and magnitude. In contrast, 1/f noise in rectifying silicon nitride nanopores is of equilibrium character. Various mechanisms underlying the voltagedependent 1/f noise are explored and discussed, including intrinsic pore wall dynamics, and formation of vortices and non-linear flow patterns in the pore. Experimental data are supported by modeling of ion currents based on the coupled Poisson-Nernst-Planck and Navier Stokes equations. We conclude that the voltage-dependent 1/f noise observed in polymer and glass asymmetric nanopores might result from high and asymmetric electric fields inducing secondary effects in the pore such as enhanced water dissociation.2

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Electrochemistry on a Localized Surface Plasmon Resonance Sensor

Cited by 76 publications

References 24 publications

Plasmoelectric potentials in metal nanostructures

Plasmoelectric potentials in metal nanostructures

Localized surface plasmon sensing based investigation of nanoscale metal oxidation kinetics

Noise Properties of Rectifying Nanopores

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