Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry
Cyclic voltammetry of ensembles of nanotube-modified electrodes fails to distinguish between signals from electroactive material adsorbed on the tubes from those due to a thin-layer response of analyte material occluded in the pores of the ensemble. We demonstrate that the distinction can be clearly...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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American Chemical Society
2022
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| _version_ | 1826307924022001664 |
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| author | Kaliyaraj Selva Kumar, A Compton, RG |
| author_facet | Kaliyaraj Selva Kumar, A Compton, RG |
| author_sort | Kaliyaraj Selva Kumar, A |
| collection | OXFORD |
| description | Cyclic voltammetry of ensembles of nanotube-modified electrodes fails to distinguish between signals from electroactive material adsorbed on the tubes from those due to a thin-layer response of analyte material occluded in the pores of the ensemble. We demonstrate that the distinction can be clearly made by combining cyclic voltammetry with single-entity measurements and provide proof of concept for the case of b-MWCNTs and the oxidation of 4-hexylresorcinol (HR), where the increased signals seen at the modified electrode are concluded to arise from thin-layer diffusion and not adsorptive effects. The physical insights are generic to porous, conductive composites. |
| first_indexed | 2024-03-07T07:10:22Z |
| format | Journal article |
| id | oxford-uuid:27ce0cd7-6562-4e91-8f54-909c423b7232 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:10:22Z |
| publishDate | 2022 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:27ce0cd7-6562-4e91-8f54-909c423b72322022-06-28T18:08:28ZUnderstanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:27ce0cd7-6562-4e91-8f54-909c423b7232EnglishSymplectic ElementsAmerican Chemical Society2022Kaliyaraj Selva Kumar, ACompton, RGCyclic voltammetry of ensembles of nanotube-modified electrodes fails to distinguish between signals from electroactive material adsorbed on the tubes from those due to a thin-layer response of analyte material occluded in the pores of the ensemble. We demonstrate that the distinction can be clearly made by combining cyclic voltammetry with single-entity measurements and provide proof of concept for the case of b-MWCNTs and the oxidation of 4-hexylresorcinol (HR), where the increased signals seen at the modified electrode are concluded to arise from thin-layer diffusion and not adsorptive effects. The physical insights are generic to porous, conductive composites. |
| spellingShingle | Kaliyaraj Selva Kumar, A Compton, RG Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry |
| title | Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry |
| title_full | Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry |
| title_fullStr | Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry |
| title_full_unstemmed | Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry |
| title_short | Understanding carbon nanotube voltammetry: distinguishing adsorptive and thin layer effects via “single-entity” electrochemistry |
| title_sort | understanding carbon nanotube voltammetry distinguishing adsorptive and thin layer effects via single entity electrochemistry |
| work_keys_str_mv | AT kaliyarajselvakumara understandingcarbonnanotubevoltammetrydistinguishingadsorptiveandthinlayereffectsviasingleentityelectrochemistry AT comptonrg understandingcarbonnanotubevoltammetrydistinguishingadsorptiveandthinlayereffectsviasingleentityelectrochemistry |