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Title: Metal Assisted Chemically Etched Silicon Nanowires as Anodes.

Abstract

Abstract not provided.

Authors:
; ;  [1]
  1. (UMaine)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1372014
Report Number(s):
SAND2016-6648D
644970
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Intern Symposium 2016 held July 26, 2016 in Albuquerque , NM , United States of America .
Country of Publication:
United States
Language:
English

Citation Formats

Height, Hannah Elise, Apblett, Christopher A., and Collins, Scott. Metal Assisted Chemically Etched Silicon Nanowires as Anodes.. United States: N. p., 2016. Web.
Height, Hannah Elise, Apblett, Christopher A., & Collins, Scott. Metal Assisted Chemically Etched Silicon Nanowires as Anodes.. United States.
Height, Hannah Elise, Apblett, Christopher A., and Collins, Scott. 2016. "Metal Assisted Chemically Etched Silicon Nanowires as Anodes.". United States. doi:. https://www.osti.gov/servlets/purl/1372014.
@article{osti_1372014,
title = {Metal Assisted Chemically Etched Silicon Nanowires as Anodes.},
author = {Height, Hannah Elise and Apblett, Christopher A. and Collins, Scott},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

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  • Abstract not provided.
  • This study focused on silicon as a high capacity replacement anode for Lithium-ion batteries. The challenge of silicon is that it expands ~270% upon lithium insertion which causes particles of silicon to fracture, causing the capacity to fade rapidly. To account for this expansion chemically etched silicon nanowires from the University of Maine were studied as anodes. They were built into electrochemical half-cells and cycled continuously to measure the capacity and capacity fade.
  • Abstract not provided.
  • Frequency dependence in phonon surface scattering is a debated topic in fundamental phonon physics. Recent experiments and theory suggest such a phenomenon, but an independent agreement between the two remains elusive. We report low-temperature dependence of thermal conductivity in silicon nanowires fabricated using a two-step, metal-assisted chemical etch. By reducing etch rates down to 0.5 nm/s from the typical >100 nm/s, we report controllable roughening of nanowire surfaces and selectively focus on moderate roughness scales rather than the extreme scales investigated previously. This critically enables direct comparison with perturbation-based spectral scattering theory. Using experimentally characterized surface roughness, we show thatmore » a multiple scattering theory provides excellent agreement and explanation of the observed low-temperature dependence of rough surface nanowires. The theory does not employ any fitting parameters. A 5-10 nm roughness correlation length is typical in metal-assisted chemical etching and resonantly scatters dominant phonons in silicon, leading to the observed similar to T1.6-2.4 behavior. Our work provides fundamental and quantitative insight into spectral phonon scattering from rough surfaces. This advances applications of nanowires in thermoelectric energy conversion.« less
  • No abstract prepared.