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dc.date.accessioned | 2021-05-18T14:39:00Z | |
dc.date.available | 2021-05-18T14:39:00Z | |
dc.date.issued | 1993 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/118957 | |
dc.description.abstract | The ac impedance behaviour of electrochemically grown dendritic Ag three-dimensional electrodeposits grown from aqueous Ag+ ion containing solutions has been studied in the blocking regime covering the 1 ⩽ f ⩽ 104 Hz frequency range (ω = 2πf). These deposits exhibit fractal surface and non fractal mass (volume) characteristics. Impedance data displayed as log Z″ vs. log ω plots show two linear portions with different frequency dispersion exponents <α > = 0.95 ± 0.03 and <α > = 0.67 ± 0.05, respectively. The crossover frequency, ωλ, as determined from those plots, mainly depends on the electrolyte resistivity and, to a minor extent, on the Ag+ ion electrodeposition charge. For ω > ωλ, the surface fractal dimension derived from the reciprocal relationship, Ds = (1/α) + 1, is Ds = 2.45 ± 0.1. This figure agrees with that obtained from the log (area) vs. log (volume) plots. | en |
dc.format.extent | 1545-1549 | es |
dc.language | en | es |
dc.subject | Fractals | es |
dc.subject | Ag electrodes | es |
dc.subject | Rough metal surfaces | es |
dc.subject | Ac impedance | es |
dc.subject | Electrodeposition | es |
dc.title | An ac impedance study of dendritic silver three-dimensional electrodeposits | en |
dc.type | Articulo | es |
sedici.identifier.issn | 0013-4686 | es |
sedici.creator.person | Hernández-Creus, A. | es |
sedici.creator.person | Bolzán, Agustín Eduardo | es |
sedici.creator.person | Carro, P. | es |
sedici.creator.person | González, S. | es |
sedici.creator.person | Salvarezza, Roberto Carlos | es |
sedici.creator.person | Arvia, Alejandro Jorge | es |
sedici.subject.materias | Ciencias Exactas | es |
sedici.subject.materias | Química | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Electrochimica Acta | es |
sedici.relation.journalVolumeAndIssue | vol. 38, no. 11 | es |