Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information)
<p dir="ltr">Although electrochemical methods have been used to relate microbial motility with ionic or redox signals, the evaluation of diffusion-layer variations induced by such motility using electrochemical impedance spectroscopy (EIS) remains limited. Thus, in this study, EIS is...
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| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , |
| منشور في: |
2025
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| الموضوعات: | |
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| _version_ | 1852016002166947840 |
|---|---|
| author | Isao SHITANDA (22326749) |
| author2 | Koji ISHIZAKI (22326753) Hikari WATANABE (22326756) Masayuki ITAGAKI (22326759) |
| author2_role | author author author |
| author_facet | Isao SHITANDA (22326749) Koji ISHIZAKI (22326753) Hikari WATANABE (22326756) Masayuki ITAGAKI (22326759) |
| author_role | author |
| dc.creator.none.fl_str_mv | Isao SHITANDA (22326749) Koji ISHIZAKI (22326753) Hikari WATANABE (22326756) Masayuki ITAGAKI (22326759) |
| dc.date.none.fl_str_mv | 2025-10-07T01:05:02Z |
| dc.identifier.none.fl_str_mv | 10.50892/data.electrochemistry.30228937.v1 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/dataset/Electrochemical_Impedance_Spectroscopic_Analysis_of_Diffusion-Layer_Thickness_Distribution_Associated_with_Flagellar_Motion_of_i_Volvox_carteri_i_Supporting_Information_/30228937 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Chemistry Bioconvection Diffusion Layer Electrochemical Impedance Spectroscopy Distributed Equivalent Circuit |
| dc.title.none.fl_str_mv | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| dc.type.none.fl_str_mv | Dataset info:eu-repo/semantics/publishedVersion dataset |
| description | <p dir="ltr">Although electrochemical methods have been used to relate microbial motility with ionic or redox signals, the evaluation of diffusion-layer variations induced by such motility using electrochemical impedance spectroscopy (EIS) remains limited. Thus, in this study, EIS is used to investigate how the flagellar activity of <i>Volvox carteri</i> modulates the diffusion layer above an electrode. Finite-element simulations and distributed equivalent-circuit modeling are performed for both uniform and non-uniform diffusion-layer thicknesses. Simulations predict that phototactic flagellar convection results in impedance spectra with a slope lower than 45° in the mid-frequency region and a pronounced finite-diffusion bend at low frequencies. These features are validated through experiments involving <i>Volvox</i>-immobilized electrodes under dark and illuminated conditions. Light irradiation reduces the effective diffusion-layer thickness from 2.4 × 10<sup>−2</sup> cm to 6.6 × 10<sup>−3</sup> cm and introduces a distributed thickness ranging from 4.5 × 10<sup>−4</sup> to 9.0 × 10<sup>−3</sup> cm, as extracted by transmission-line fitting. These results provide quantitative insights into bio-induced mass-transport modulation and demonstrate the applicability of distributed diffusion models in bioelectrochemical systems.</p> |
| eu_rights_str_mv | openAccess |
| id | Manara_b0914bb1699fe3515dfd64bd752c46b0 |
| identifier_str_mv | 10.50892/data.electrochemistry.30228937.v1 |
| network_acronym_str | Manara |
| network_name_str | ManaraRepo |
| oai_identifier_str | oai:figshare.com:article/30228937 |
| publishDate | 2025 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information)Isao SHITANDA (22326749)Koji ISHIZAKI (22326753)Hikari WATANABE (22326756)Masayuki ITAGAKI (22326759)ChemistryBioconvectionDiffusion LayerElectrochemical Impedance SpectroscopyDistributed Equivalent Circuit<p dir="ltr">Although electrochemical methods have been used to relate microbial motility with ionic or redox signals, the evaluation of diffusion-layer variations induced by such motility using electrochemical impedance spectroscopy (EIS) remains limited. Thus, in this study, EIS is used to investigate how the flagellar activity of <i>Volvox carteri</i> modulates the diffusion layer above an electrode. Finite-element simulations and distributed equivalent-circuit modeling are performed for both uniform and non-uniform diffusion-layer thicknesses. Simulations predict that phototactic flagellar convection results in impedance spectra with a slope lower than 45° in the mid-frequency region and a pronounced finite-diffusion bend at low frequencies. These features are validated through experiments involving <i>Volvox</i>-immobilized electrodes under dark and illuminated conditions. Light irradiation reduces the effective diffusion-layer thickness from 2.4 × 10<sup>−2</sup> cm to 6.6 × 10<sup>−3</sup> cm and introduces a distributed thickness ranging from 4.5 × 10<sup>−4</sup> to 9.0 × 10<sup>−3</sup> cm, as extracted by transmission-line fitting. These results provide quantitative insights into bio-induced mass-transport modulation and demonstrate the applicability of distributed diffusion models in bioelectrochemical systems.</p>2025-10-07T01:05:02ZDatasetinfo:eu-repo/semantics/publishedVersiondataset10.50892/data.electrochemistry.30228937.v1https://figshare.com/articles/dataset/Electrochemical_Impedance_Spectroscopic_Analysis_of_Diffusion-Layer_Thickness_Distribution_Associated_with_Flagellar_Motion_of_i_Volvox_carteri_i_Supporting_Information_/30228937CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/302289372025-10-07T01:05:02Z |
| spellingShingle | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) Isao SHITANDA (22326749) Chemistry Bioconvection Diffusion Layer Electrochemical Impedance Spectroscopy Distributed Equivalent Circuit |
| status_str | publishedVersion |
| title | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| title_full | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| title_fullStr | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| title_full_unstemmed | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| title_short | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| title_sort | Electrochemical Impedance Spectroscopic Analysis of Diffusion-Layer Thickness Distribution Associated with Flagellar Motion of <i>Volvox carteri</i> (Supporting Information) |
| topic | Chemistry Bioconvection Diffusion Layer Electrochemical Impedance Spectroscopy Distributed Equivalent Circuit |