Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes
Abstract Electrochemical measurements using an agarose hydrogel as a solid electrolyte and ferrocyanide as a redox probe were conducted to analyze transport properties and natural convection effects. The mass transport properties and diffusion coefficients of ferrocyanide were studied using various...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-02-01
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| Series: | Journal of Analytical Science and Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40543-023-00375-4 |
| _version_ | 1811165877196816384 |
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| author | Jihun Han Sukman Jang Byung-Kwon Kim Kyungsoon Park |
| author_facet | Jihun Han Sukman Jang Byung-Kwon Kim Kyungsoon Park |
| author_sort | Jihun Han |
| collection | DOAJ |
| description | Abstract Electrochemical measurements using an agarose hydrogel as a solid electrolyte and ferrocyanide as a redox probe were conducted to analyze transport properties and natural convection effects. The mass transport properties and diffusion coefficients of ferrocyanide were studied using various macroelectrodes and ultramicroelectrodes via cyclic voltammetry. The experimental results confirmed that the mass transfer behavior in agarose was similar to that in solution. The good linearity of the square root of the scan-rate-dependent peak current demonstrated that diffusion is dominant during mass transfer in agarose hydrogel owing to a reduction in other mass transport effects (i.e., migration and convection). Furthermore, chronoamperometry (CA) was performed to estimate the effects of natural convection in the solution and agarose hydrogel. CA curves and plots of current as a function of the inverse square root of time yielded irregular and irreproducible responses in the solution for relatively long-term electrochemistry. However, in the agarose hydrogel, the CA response was more regular and reproducible for > 300 s because of reduced natural convection, based on the Cottrell’s theory. |
| first_indexed | 2024-04-10T15:44:34Z |
| format | Article |
| id | doaj.art-c01cc2a615cd46c0b30c656f087d96fb |
| institution | Directory Open Access Journal |
| issn | 2093-3371 |
| language | English |
| last_indexed | 2024-04-10T15:44:34Z |
| publishDate | 2023-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Analytical Science and Technology |
| spelling | doaj.art-c01cc2a615cd46c0b30c656f087d96fb2023-02-12T12:14:32ZengSpringerOpenJournal of Analytical Science and Technology2093-33712023-02-011411810.1186/s40543-023-00375-4Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodesJihun Han0Sukman Jang1Byung-Kwon Kim2Kyungsoon Park3Department of Chemistry and Cosmetics, Jeju National UniversityDepartment of Chemistry, Dankook UniversityDepartment of Chemistry and Nanoscience, Ewha Womans UniversityDepartment of Chemistry and Cosmetics, Jeju National UniversityAbstract Electrochemical measurements using an agarose hydrogel as a solid electrolyte and ferrocyanide as a redox probe were conducted to analyze transport properties and natural convection effects. The mass transport properties and diffusion coefficients of ferrocyanide were studied using various macroelectrodes and ultramicroelectrodes via cyclic voltammetry. The experimental results confirmed that the mass transfer behavior in agarose was similar to that in solution. The good linearity of the square root of the scan-rate-dependent peak current demonstrated that diffusion is dominant during mass transfer in agarose hydrogel owing to a reduction in other mass transport effects (i.e., migration and convection). Furthermore, chronoamperometry (CA) was performed to estimate the effects of natural convection in the solution and agarose hydrogel. CA curves and plots of current as a function of the inverse square root of time yielded irregular and irreproducible responses in the solution for relatively long-term electrochemistry. However, in the agarose hydrogel, the CA response was more regular and reproducible for > 300 s because of reduced natural convection, based on the Cottrell’s theory.https://doi.org/10.1186/s40543-023-00375-4Agarose hydrogelNatural convectionMass transport propertiesLong-term electrochemistry |
| spellingShingle | Jihun Han Sukman Jang Byung-Kwon Kim Kyungsoon Park Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes Journal of Analytical Science and Technology Agarose hydrogel Natural convection Mass transport properties Long-term electrochemistry |
| title | Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes |
| title_full | Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes |
| title_fullStr | Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes |
| title_full_unstemmed | Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes |
| title_short | Electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes |
| title_sort | electrochemical study of agarose hydrogels for natural convection on macroelectrodes and ultramicroelectrodes |
| topic | Agarose hydrogel Natural convection Mass transport properties Long-term electrochemistry |
| url | https://doi.org/10.1186/s40543-023-00375-4 |
| work_keys_str_mv | AT jihunhan electrochemicalstudyofagarosehydrogelsfornaturalconvectiononmacroelectrodesandultramicroelectrodes AT sukmanjang electrochemicalstudyofagarosehydrogelsfornaturalconvectiononmacroelectrodesandultramicroelectrodes AT byungkwonkim electrochemicalstudyofagarosehydrogelsfornaturalconvectiononmacroelectrodesandultramicroelectrodes AT kyungsoonpark electrochemicalstudyofagarosehydrogelsfornaturalconvectiononmacroelectrodesandultramicroelectrodes |