| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000390693 |
| ISSN: | 0103-9733 |
| Authors: | Giacometti, Jose A1 Alves, Neri2 Teruya, Marcia Y2 |
| Institutions: | 1Universidade de Sao Paulo, Instituto de Fisica de Sao Carlos, Sao Carlos, Sao Paulo. Brasil 2Universidade Estadual Paulista "Julio de Mesquita Filho", Faculdade de Ciencias e Tecnologia, Presidente Prudente, Sao Paulo. Brasil |
| Year: | 2016 |
| Season: | Feb |
| Volumen: | 46 |
| Number: | 1 |
| Pages: | 50-55 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | This paper reports on the analysis of dispersion in the imaginary part of impedance often observed at low frequencies in a variety of systems. The experimental data were obtained with an electrolytic cell containing KCl aqueous solution in the frequency range from 0.1 mHz to 10 MHz, where the use of ultra-low frequencies helps clarify the analysis of the imaginary impedance dispersion. It is shown that the low frequency dispersion described in the literature is the tail of a relaxation peak located at f≅20 mHz. This ultra-low frequency dispersion peak is analyzed with a Cole-Cole impedance element, being associated with the electric double layer at the metal-electrolyte interface. Quantitative information can be extracted for the double layer, including its thickness (∼1 nm) and electrical resistivity (∼50 GΩm) |
| Disciplines: | Física y astronomía, Ingeniería |
| Keyword: | Física de materia condensada, Ingeniería eléctrica, Soluciones electrolíticas, Doble capa eléctrica, Interfase metal-electrolito, Impedancia, Frecuencia ultra baja |
| Keyword: | Physics and astronomy, Engineering, Condensed matter physics, Electrical engineering, Electrolytic solutions, Electric double layer, Metal-electrolyte interface, Impedance, Ultra-low frequency |
| Full text: | Texto completo (Ver PDF) |
