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Silver particle nucleation and growth at liquid/liquid interfaces: a scanning electrochemical microscopy approach
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Li, Fei, Edwards, Martin A., Guo, Jidong and Unwin, Patrick R. (2009) Silver particle nucleation and growth at liquid/liquid interfaces: a scanning electrochemical microscopy approach. Journal of Physical Chemistry C, Vol.113 (No.9). pp. 3553-3565. doi:10.1021/jp809165t
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Official URL: http://dx.doi.org/10.1021/jp809165t
Abstract
Scanning electrochemical microscopy (SECM) has been used to induce and monitor the electrodeposition of silver particles at a liquid/liquid interface by the electron transfer reaction between aqueous Ag+ ions, generated by anodic dissolution of an Ag disk ultramicroelectrode (UME), and bis(pentamethylcyclopentadienyl) iron (decamethylferrocene, DMFc) in a 1,2-dichloroethane (DCE) phase. A two-electrode system with an Ag UME as the SECM tip was used to investigate the factors affecting the deposition process, such as the tip-interface separation, potential applied to the tip, concentration of the reductant in the DCE phase, and the reaction driving force, which was controlled by the concentration ratio of a common ion (ClO4-) in the two phases. A theoretical model was developed and rate constants for Ag particle nucleation and growth at the water/DCE interface were obtained by thorough analysis of experimental current-time curves. It was found that Ag+ ion adsorption at the interface, coupled to particle nucleation and growth, best described the experimental data. The growth of Ag particles at the liquid/liquid interface was confirmed by independent microscopy measurements.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QD Chemistry T Technology T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
| Journal or Publication Title: | Journal of Physical Chemistry C | ||||
| Publisher: | American Chemical Society | ||||
| ISSN: | 1932-7447 | ||||
| Official Date: | 5 March 2009 | ||||
| Dates: |
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| Volume: | Vol.113 | ||||
| Number: | No.9 | ||||
| Number of Pages: | 13 | ||||
| Page Range: | pp. 3553-3565 | ||||
| DOI: | 10.1021/jp809165t | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Dorothy Hodgkin Postgraduate Awards Scheme, Engineering and Physical Sciences Research Council (EPSRC), University of Warwick. MOAC Doctoral Training Centre |
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