The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles
Electrochemical impact experiments can be used to detect and size single nanoparticles in suspension and at low concentrations. This is generally performed using a micro-disc working electrode; however, for the first time we report the use of cylindrical micro-wire electrodes for nanoparticle impact...
| Main Authors: | , , , |
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| Format: | Journal article |
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2014
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| _version_ | 1826269849903431680 |
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| author | Ellison, J Batchelor-McAuley, C Tschulik, K Compton, R |
| author_facet | Ellison, J Batchelor-McAuley, C Tschulik, K Compton, R |
| author_sort | Ellison, J |
| collection | OXFORD |
| description | Electrochemical impact experiments can be used to detect and size single nanoparticles in suspension and at low concentrations. This is generally performed using a micro-disc working electrode; however, for the first time we report the use of cylindrical micro-wire electrodes for nanoparticle impact experiments. These electrodes provide much enhanced detection limits; specifically decreasing the concentration of nanoparticles measurable by over two orders of magnitude. In addition, the use of micro-wire electrodes reduces the shielding effect due to absorption of particles to the insulating sheath that surrounds a micro-disc electrode. Micro-wire electrodes are fabricated and their electrochemical response analysed via cyclic voltammetry experiments using molecular species. This provides a theoretical framework which is used to calculate the reduced concentration of nanoparticles required for an impact experiment at a micro-cylinder electrode in comparison to the micro-disc. Experimentally, it is demonstrated that impact experiments on the micro-cylinder electrodes can indeed be used for accurate characterisation of ultra-low concentrations (≈0.1 pM) of silver nanoparticles. © 2014 Elsevier B.V. |
| first_indexed | 2024-03-06T21:31:37Z |
| format | Journal article |
| id | oxford-uuid:44df07db-426c-4223-902c-a66641c39bd4 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:31:37Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:44df07db-426c-4223-902c-a66641c39bd42022-03-26T15:04:20ZThe use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticlesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:44df07db-426c-4223-902c-a66641c39bd4Symplectic Elements at Oxford2014Ellison, JBatchelor-McAuley, CTschulik, KCompton, RElectrochemical impact experiments can be used to detect and size single nanoparticles in suspension and at low concentrations. This is generally performed using a micro-disc working electrode; however, for the first time we report the use of cylindrical micro-wire electrodes for nanoparticle impact experiments. These electrodes provide much enhanced detection limits; specifically decreasing the concentration of nanoparticles measurable by over two orders of magnitude. In addition, the use of micro-wire electrodes reduces the shielding effect due to absorption of particles to the insulating sheath that surrounds a micro-disc electrode. Micro-wire electrodes are fabricated and their electrochemical response analysed via cyclic voltammetry experiments using molecular species. This provides a theoretical framework which is used to calculate the reduced concentration of nanoparticles required for an impact experiment at a micro-cylinder electrode in comparison to the micro-disc. Experimentally, it is demonstrated that impact experiments on the micro-cylinder electrodes can indeed be used for accurate characterisation of ultra-low concentrations (≈0.1 pM) of silver nanoparticles. © 2014 Elsevier B.V. |
| spellingShingle | Ellison, J Batchelor-McAuley, C Tschulik, K Compton, R The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles |
| title | The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles |
| title_full | The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles |
| title_fullStr | The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles |
| title_full_unstemmed | The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles |
| title_short | The use of cylindrical micro-wire electrodes for nano-impact experiments; facilitating the sub-picomolar detection of single nanoparticles |
| title_sort | use of cylindrical micro wire electrodes for nano impact experiments facilitating the sub picomolar detection of single nanoparticles |
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