Autonomous Oscillations and Pattern Formation with Zero External Resistance during Silicon Electrodissolution

Maximilian Patzauer; Richard Hueck; Anton Tosolini; Konrad Schönleber; Katharina Krischer

doi:10.1016/j.electacta.2017.06.005

Autonomous Oscillations and Pattern Formation with Zero External Resistance during Silicon Electrodissolution

Maximilian Patzauer, Richard Hueck, Anton Tosolini, Konrad Schönleber, Katharina Krischer

Associate Professorship of Technical Physics

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We report the existence of small autonomous amplitude oscillations without the presence of an external series resistor during electrodissolution of both p- and highly illuminated n-type Si electrodes in a 60 mM NH₄F electrolyte at pH 1. This finding enabled us to study possible emergence of patterns without the presence of the global coupling induced by an external resistance. While with p-type electrodes we could not find a spatial bifurcation upon varying the parameters, stable domain-type patterns with distinct dynamics formed spontaneously when lowering the illumination intensity. Their emergence could be linked to the lateral coupling through valence band holes. Experiments where only part of the electrode was illuminated gave further insight into the role of the hole dynamics for the formation of spatio-temporal dissipative structures.

Original language	English
Pages (from-to)	315-321
Number of pages	7
Journal	Electrochimica Acta
Volume	246
DOIs	https://doi.org/10.1016/j.electacta.2017.06.005
State	Published - 20 Aug 2017

Keywords

Chimera states
Electrochemical oscillations
Nonlinear dynamics
Reaction diffusion system
Silicon electrochemistry

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10.1016/j.electacta.2017.06.005

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title = "Autonomous Oscillations and Pattern Formation with Zero External Resistance during Silicon Electrodissolution",

abstract = "We report the existence of small autonomous amplitude oscillations without the presence of an external series resistor during electrodissolution of both p- and highly illuminated n-type Si electrodes in a 60 mM NH4F electrolyte at pH 1. This finding enabled us to study possible emergence of patterns without the presence of the global coupling induced by an external resistance. While with p-type electrodes we could not find a spatial bifurcation upon varying the parameters, stable domain-type patterns with distinct dynamics formed spontaneously when lowering the illumination intensity. Their emergence could be linked to the lateral coupling through valence band holes. Experiments where only part of the electrode was illuminated gave further insight into the role of the hole dynamics for the formation of spatio-temporal dissipative structures.",

keywords = "Chimera states, Electrochemical oscillations, Nonlinear dynamics, Reaction diffusion system, Silicon electrochemistry",

author = "Maximilian Patzauer and Richard Hueck and Anton Tosolini and Konrad Sch{\"o}nleber and Katharina Krischer",

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AU - Patzauer, Maximilian

AU - Hueck, Richard

AU - Tosolini, Anton

AU - Schönleber, Konrad

AU - Krischer, Katharina

PY - 2017/8/20

Y1 - 2017/8/20

N2 - We report the existence of small autonomous amplitude oscillations without the presence of an external series resistor during electrodissolution of both p- and highly illuminated n-type Si electrodes in a 60 mM NH4F electrolyte at pH 1. This finding enabled us to study possible emergence of patterns without the presence of the global coupling induced by an external resistance. While with p-type electrodes we could not find a spatial bifurcation upon varying the parameters, stable domain-type patterns with distinct dynamics formed spontaneously when lowering the illumination intensity. Their emergence could be linked to the lateral coupling through valence band holes. Experiments where only part of the electrode was illuminated gave further insight into the role of the hole dynamics for the formation of spatio-temporal dissipative structures.

AB - We report the existence of small autonomous amplitude oscillations without the presence of an external series resistor during electrodissolution of both p- and highly illuminated n-type Si electrodes in a 60 mM NH4F electrolyte at pH 1. This finding enabled us to study possible emergence of patterns without the presence of the global coupling induced by an external resistance. While with p-type electrodes we could not find a spatial bifurcation upon varying the parameters, stable domain-type patterns with distinct dynamics formed spontaneously when lowering the illumination intensity. Their emergence could be linked to the lateral coupling through valence band holes. Experiments where only part of the electrode was illuminated gave further insight into the role of the hole dynamics for the formation of spatio-temporal dissipative structures.

KW - Chimera states

KW - Electrochemical oscillations

KW - Nonlinear dynamics

KW - Reaction diffusion system

KW - Silicon electrochemistry

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DO - 10.1016/j.electacta.2017.06.005

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VL - 246

SP - 315

EP - 321

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Autonomous Oscillations and Pattern Formation with Zero External Resistance during Silicon Electrodissolution

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Keywords

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