Template-free electrochemical deposition of tellurium nanowires with eutectic solvents
Template-free electrochemical deposition of tellurium nanowires with eutectic solvents
Electrochemical deposition of tellurium from deep eutectic solvents (DES) at gold film electrodes produced films of tellurium nanowires. The deposition was evenly distributed over the gold surface, with an average diameter of ~70 nm and length of ~1 μm. Deposition was extremely sensitive to the applied potential, tellurium concentration and deposition bath temperature, with deviations away from optimised conditions preventing the formation of the desired nanostructure. Interestingly, replacing the chloride in a popular eutectic solvent with bromide or iodide had a significant impact on the resultant film structure, with bromide giving no clearly defined nanostructure but iodide giving nanoplatelets. This demonstrates a strong control of tellurium nanostructure by halide ions, offering a way to two distinct nanostructures from the same core experimental set up.
Deep eutectic solvents, electrodeposition, nanoplatelets, nanowires, tellurium
Perry, Samuel C.
8e204d86-4a9c-4a5d-9932-cf470174648e
White, Joshua
3025791c-ba86-4207-8059-19ff2617122c
Nandhakumar, Iris
e9850fe5-1152-4df8-8a26-ed44b5564b04
20 January 2023
Perry, Samuel C.
8e204d86-4a9c-4a5d-9932-cf470174648e
White, Joshua
3025791c-ba86-4207-8059-19ff2617122c
Nandhakumar, Iris
e9850fe5-1152-4df8-8a26-ed44b5564b04
Perry, Samuel C., White, Joshua and Nandhakumar, Iris
(2023)
Template-free electrochemical deposition of tellurium nanowires with eutectic solvents.
Electrochimica Acta, 439, [141674].
(doi:10.1016/j.electacta.2022.141674).
Abstract
Electrochemical deposition of tellurium from deep eutectic solvents (DES) at gold film electrodes produced films of tellurium nanowires. The deposition was evenly distributed over the gold surface, with an average diameter of ~70 nm and length of ~1 μm. Deposition was extremely sensitive to the applied potential, tellurium concentration and deposition bath temperature, with deviations away from optimised conditions preventing the formation of the desired nanostructure. Interestingly, replacing the chloride in a popular eutectic solvent with bromide or iodide had a significant impact on the resultant film structure, with bromide giving no clearly defined nanostructure but iodide giving nanoplatelets. This demonstrates a strong control of tellurium nanostructure by halide ions, offering a way to two distinct nanostructures from the same core experimental set up.
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More information
Accepted/In Press date: 3 December 2022
e-pub ahead of print date: 5 December 2022
Published date: 20 January 2023
Additional Information:
This work was financially supported by the Engineering and Physical Sciences Research Council (EPSRC) Grant No. EP/T026219/1. The authors would also like to thank Nikolay Zhelev for assistance in the preparation of the gold coated glass electrodes in this work, and the University of Southampton Glassblowers for producing custom fritted glass electrode bodies for reference electrode fabrication.
Keywords:
Deep eutectic solvents, electrodeposition, nanoplatelets, nanowires, tellurium
Identifiers
Local EPrints ID: 473327
URI: http://eprints.soton.ac.uk/id/eprint/473327
ISSN: 0013-4686
PURE UUID: 20ca02c6-7397-4f8f-a563-e794f61b9587
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Date deposited: 16 Jan 2023 17:31
Last modified: 17 Mar 2024 03:50
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Author:
Samuel C. Perry
Author:
Joshua White
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