In situ X-ray nanotomography of metal surfaces during electropolishing
Abstract
A low voltage electropolishing of metal wires is attractive for nanotechnology because it provides centimeter long and micrometer thick probes with the tip radius of tens of nanometers. Using X-ray nanotomography we studied morphological transformations of the surface of tungsten wires in a specially designed electrochemical cell where the wire is vertically submersed into the KOH electrolyte. We show that stability and uniformity of the probe span is supported by a porous shell growing at the surface of tungsten oxide and shielding the wire surface from flowing electrolyte. We discovered that the kinetics of shell growth at the triple line, where meniscus meets the wire, is very different from that of the bulk of electrolyte. Many metals follow similar electrochemical transformations hence the discovered morphological transformations of metal surfaces are expected to play significant role in many natural and technological applications.
- Authors:
-
- Clemson Univ., SC (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States). School of Materials Science and Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States). Photon Sciences Directorate
- Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Mechanical Engineering
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1259264
- Grant/Contract Number:
- AC02-98CH10886; FA9550-12-1-0458
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 5; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Nave, Maryana I., Allen, Jason P., Karen Chen-Wiegart, Yu-chen, Wang, Jun, Kalidindi, Surya R., and Kornev, Konstantin G. In situ X-ray nanotomography of metal surfaces during electropolishing. United States: N. p., 2015.
Web. doi:10.1038/srep15257.
Nave, Maryana I., Allen, Jason P., Karen Chen-Wiegart, Yu-chen, Wang, Jun, Kalidindi, Surya R., & Kornev, Konstantin G. In situ X-ray nanotomography of metal surfaces during electropolishing. United States. https://doi.org/10.1038/srep15257
Nave, Maryana I., Allen, Jason P., Karen Chen-Wiegart, Yu-chen, Wang, Jun, Kalidindi, Surya R., and Kornev, Konstantin G. Thu .
"In situ X-ray nanotomography of metal surfaces during electropolishing". United States. https://doi.org/10.1038/srep15257. https://www.osti.gov/servlets/purl/1259264.
@article{osti_1259264,
title = {In situ X-ray nanotomography of metal surfaces during electropolishing},
author = {Nave, Maryana I. and Allen, Jason P. and Karen Chen-Wiegart, Yu-chen and Wang, Jun and Kalidindi, Surya R. and Kornev, Konstantin G.},
abstractNote = {A low voltage electropolishing of metal wires is attractive for nanotechnology because it provides centimeter long and micrometer thick probes with the tip radius of tens of nanometers. Using X-ray nanotomography we studied morphological transformations of the surface of tungsten wires in a specially designed electrochemical cell where the wire is vertically submersed into the KOH electrolyte. We show that stability and uniformity of the probe span is supported by a porous shell growing at the surface of tungsten oxide and shielding the wire surface from flowing electrolyte. We discovered that the kinetics of shell growth at the triple line, where meniscus meets the wire, is very different from that of the bulk of electrolyte. Many metals follow similar electrochemical transformations hence the discovered morphological transformations of metal surfaces are expected to play significant role in many natural and technological applications.},
doi = {10.1038/srep15257},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2015},
month = {Thu Oct 15 00:00:00 EDT 2015}
}
Web of Science
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