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Title: Using galvanostatic electroforming of Bi1–xSbx nanowires to control composition, crystallinity, and orientation

Abstract

When using galvanostatic pulse deposition, we studied the factors influencing the quality of electroformed Bi1–xSbx nanowires with respect to composition, crystallinity, and preferred orientation for high thermoelectric performance. Two nonaqueous baths with different Sb salts were investigated. The Sb salts used played a major role in both crystalline quality and preferred orientations. Nanowire arrays electroformed using an SbI3 -based chemistry were polycrystalline with no preferred orientation, whereas arrays electroformed from an SbCl3-based chemistry were strongly crystallographically textured with the desired trigonal orientation for optimal thermoelectric performance. From the SbCl3 bath, the electroformed nanowire arrays were optimized to have nanocompositional uniformity, with a nearly constant composition along the nanowire length. Moreover, nanowires harvested from the center of the array had an average composition of Bi0.75 Sb0.25. However, the nanowire compositions were slightly enriched in Sb in a small region near the edges of the array, with the composition approaching Bi0.70Sb0.30.

Authors:
 [1];  [2];  [1];  [2];  [2];  [2];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1146606
Report Number(s):
SAND-2014-4485J
Journal ID: ISSN 0884-2914; PII: S0884291414003549
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research
Additional Journal Information:
Journal Volume: 30; Journal Issue: 02; Journal ID: ISSN 0884-2914
Publisher:
Materials Research Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Limmer, Steven J., Medlin, Douglas L., Siegal, Michael P., Hekmaty, Michelle, Lensch-Falk, Jessica L., Erickson, Kristopher, Pillars, Jamin, and Yelton, W. Graham. Using galvanostatic electroforming of Bi1–xSbx nanowires to control composition, crystallinity, and orientation. United States: N. p., 2014. Web. doi:10.1557/jmr.2014.354.
Limmer, Steven J., Medlin, Douglas L., Siegal, Michael P., Hekmaty, Michelle, Lensch-Falk, Jessica L., Erickson, Kristopher, Pillars, Jamin, & Yelton, W. Graham. Using galvanostatic electroforming of Bi1–xSbx nanowires to control composition, crystallinity, and orientation. United States. https://doi.org/10.1557/jmr.2014.354
Limmer, Steven J., Medlin, Douglas L., Siegal, Michael P., Hekmaty, Michelle, Lensch-Falk, Jessica L., Erickson, Kristopher, Pillars, Jamin, and Yelton, W. Graham. Wed . "Using galvanostatic electroforming of Bi1–xSbx nanowires to control composition, crystallinity, and orientation". United States. https://doi.org/10.1557/jmr.2014.354. https://www.osti.gov/servlets/purl/1146606.
@article{osti_1146606,
title = {Using galvanostatic electroforming of Bi1–xSbx nanowires to control composition, crystallinity, and orientation},
author = {Limmer, Steven J. and Medlin, Douglas L. and Siegal, Michael P. and Hekmaty, Michelle and Lensch-Falk, Jessica L. and Erickson, Kristopher and Pillars, Jamin and Yelton, W. Graham},
abstractNote = {When using galvanostatic pulse deposition, we studied the factors influencing the quality of electroformed Bi1–xSbx nanowires with respect to composition, crystallinity, and preferred orientation for high thermoelectric performance. Two nonaqueous baths with different Sb salts were investigated. The Sb salts used played a major role in both crystalline quality and preferred orientations. Nanowire arrays electroformed using an SbI3 -based chemistry were polycrystalline with no preferred orientation, whereas arrays electroformed from an SbCl3-based chemistry were strongly crystallographically textured with the desired trigonal orientation for optimal thermoelectric performance. From the SbCl3 bath, the electroformed nanowire arrays were optimized to have nanocompositional uniformity, with a nearly constant composition along the nanowire length. Moreover, nanowires harvested from the center of the array had an average composition of Bi0.75 Sb0.25. However, the nanowire compositions were slightly enriched in Sb in a small region near the edges of the array, with the composition approaching Bi0.70Sb0.30.},
doi = {10.1557/jmr.2014.354},
journal = {Journal of Materials Research},
number = 02,
volume = 30,
place = {United States},
year = {Wed Dec 03 00:00:00 EST 2014},
month = {Wed Dec 03 00:00:00 EST 2014}
}

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Works referencing / citing this record:

Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films
journal, April 2017

  • Siegal, M. P.; Lima-Sharma, A. L.; Sharma, P. A.
  • Applied Physics Letters, Vol. 110, Issue 14
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