Electrochemical behavior of dispersions of spherical ultramicroelectrodes

Fleischmann, M.; Ghoroghchian, Jamal; Rolison, Debra R.; Pons, Stanley

doi:10.1021/j100281a065

Cited by 175 publications

(170 citation statements)

References 16 publications

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“…Under an electric field inside the dielectric, the metal nanoclusters can be treated as BPEs 25,28,29 , with an effective cathode (d-) facing the field direction and an effective anode (d þ ) on the opposite side, as shown in Fig. 1q.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical dynamics of nanoscale metallic inclusions in dielectrics

et al. 2014

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Nanoscale metal inclusions in or on solid-state dielectrics are an integral part of modern electrocatalysis, optoelectronics, capacitors, metamaterials and memory devices. The properties of these composite systems strongly depend on the size, dispersion of the inclusions and their chemical stability, and are usually considered constant. Here we demonstrate that nanoscale inclusions (for example, clusters) in dielectrics dynamically change their shape, size and position upon applied electric field. Through systematic in situ transmission electron microscopy studies, we show that fundamental electrochemical processes can lead to universally observed nucleation and growth of metal clusters, even for inert metals like platinum. The clusters exhibit diverse dynamic behaviours governed by kinetic factors including ion mobility and redox rates, leading to different filament growth modes and structures in memristive devices. These findings reveal the microscopic origin behind resistive switching, and also provide general guidance for the design of novel devices involving electronics and ionics.

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Section: Resultsmentioning

confidence: 99%

Electrochemical dynamics of nanoscale metallic inclusions in dielectrics

et al. 2014

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“…Neste caso, podese citar: (a) reações de desprendimento de gases 10,11 , (b) estudo de reações orgânicas [12][13][14][15] , (c) eletrocristalização 16,17 e (d) estudos voltamétricos na ausência de eletrólito de suporte 18,19 . Devido à freqüente utilização de UME nas diversas áreas como as descritas, vários artigos e revisões tratam de suas propriedades, vantagens e limitações [20][21][22][23][24] . Um artigo anterior deste Grupo foi publicado, analisando seus aspectos teóricos 25 .…”

Section: Introductionunclassified

Ultramicroeletrodos. Parte II: construção e aplicações

et al. 1998

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Recebido em 16/10/96; aceito em 14/1/97 ULTRAMICROELECTRODES. PART II: CONSTRUCTION AND APPLICATIONS. This work describes the techniques of construction and several applications of ultramicroelectrodes in electrochemistry and electroanalytical chemistry. Disc shaped UME are produced by embedding metal wires on insulating materials such as glass or epoxy resin. In the field of electrochemistry, UME have been applied in studies of the hydrogen evolution reaction and the electrocrystallization of metals. The negligible values of sensibility for ohmic drop and the enhanced mass transport rate by spherical diffusion are the main advantages of UME in these applications. New important conclusions regarding the phenomena under study were drawn from the experimental results. The applications in electroanalytical chemistry involved the determination of contaminants such as heavy metals and nitrites in natural waters and food products. The use of UME requires little sample manipulation and, in general, no need for oxygen removal or the addition of supporting electrolytes.

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“…11,12 Furthermore, the results are not complicated by the influence of binders, electronically conductive additives, or other components necessary for the fabrication of porous electrodes. In other words, the response is solely from the reaction between the active material and the electrolyte.…”

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Modeling Lithium Intercalation of a Single Spinel Particle under Potentiodynamic Control

Zhang

Popov

White

2000

J. Electrochem. Soc.

172

118

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A mathematical model is presented for the lithium intercalation of a single spinel particle as a microelectrode under the stimulus of a cyclic linear potential sweep. The model includes both lithium diffusion within the particle and kinetics at the particle/electrolyte interface. The model is used to predict that peak current densities depend linearly on the scan rate to a certain power with a constant term, which is different from the predicted peak current density for a conventional redox system.

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Electrochemical behavior of dispersions of spherical ultramicroelectrodes

Cited by 175 publications

References 16 publications

Electrochemical dynamics of nanoscale metallic inclusions in dielectrics

Electrochemical dynamics of nanoscale metallic inclusions in dielectrics

Ultramicroeletrodos. Parte II: construção e aplicações

Modeling Lithium Intercalation of a Single Spinel Particle under Potentiodynamic Control

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