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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

Simonoff, Ethan and Van Muñoz, Lorenzo X. and Lewis, Nathan S. (2020) 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. Nanoscale, 12 (44). pp. 22478-22486. ISSN 2040-3364. https://resolver.caltech.edu/CaltechAUTHORS:20201110-101255735

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1039/d0nr07617aDOIArticle
ORCID:
AuthorORCID
Simonoff, Ethan0000-0002-2156-8602
Van Muñoz, Lorenzo X.0000-0003-0807-5034
Lewis, Nathan S.0000-0001-5245-0538
Alternate 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
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.
Funders:
Funding AgencyGrant Number
NSFDMR-1905963
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Issue or Number:44
Record Number:CaltechAUTHORS:20201110-101255735
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20201110-101255735
Official Citation: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. Nanoscale, 2020, 12, 22478-22486; doi: 10.1039/d0nr07617a
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106587
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:10 Nov 2020 18:38
Last Modified:20 Nov 2020 18:40

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