Increased spatial randomness and disorder of nucleates in dark-phase electrodeposition lead to increased spatial order and pattern fidelity in phototropically grown Se–Te electrodeposits
Abstract
The role of nucleation was investigated during phototropic growth of Se–Te. Under low levels of mass deposition (mass equivalent of −3.75 mC cm⁻² of charge passed) that produced small nucleate spacings, patterns in photoelectrochemically deposited Se–Te films converged at relatively earlier levels of mass deposition and ultimately exhibited higher pattern fidelity throughout pattern development as compared to pattern formation from larger initial nucleate spacings. Consistently, use of an applied striking potential during very early levels of mass deposition produced more spatially random dark-phase electrodeposited nucleates and led to phototropic Se–Te photoelectrodeposited films that exhibited improved pattern fidelity relative to depositions performed with no striking step. Collectively, the data indicate that increases in randomness and spatial disorder of the dispersion of the initial nucleates produces increases in the fidelity and spatial order in the resulting phototropically grown electrodeposits.
Additional Information
© 2020 The Royal Society of Chemistry. Submitted 23 Oct 2020; Accepted 27 Oct 2020; First published 30 Oct 2020. This work was supported by the National Science Foundation under Award Number DMR1905963. The authors acknowledge Kathryn R. Hamann for assistance with image collection. L. X. V. M. acknowledges financial support from the Richard H. Cox SURF Fellowship. The authors declare no competing financial interest.Attached Files
Supplemental Material - d0nr07617a1.pdf
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Additional details
- Alternative title
- Increased spatial randomness and disorder of nucleates in dark-phase electrodeposition lead to increased spatial order and pattern fidelity in phototropically grown Se-Te electrodeposits
- Eprint ID
- 106587
- Resolver ID
- CaltechAUTHORS:20201110-101255735
- NSF
- DMR-1905963
- Caltech Summer Undergraduate Research Fellowship (SURF)
- Created
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2020-11-10Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field