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Title: Ion-beam-induced planarization, densification, and exfoliation of low-density nanoporous silica

Abstract

Planarization of low-density nanoporous solids is challenging. Here, we demonstrate that ion bombardment to doses of ~1015 cm-2 results in significant smoothing of silica aerogels, yielding mirror-like surfaces after metallization. The surface smoothing efficiency scales with the ion energy loss component leading to local lattice heating. Furthermore, planarization is accompanied by sub-surface monolith densification, resulting in surface exfoliation with increasing ion dose. These findings have implications for the fabrication of graded-density nanofoams, aerogel-based lightweight optical components, and meso-origami.

Authors:
 [1]; ORCiD logo [1]
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1810669
Alternate Identifier(s):
OSTI ID: 1394675
Report Number(s):
LLNL-JRNL-708784
Journal ID: ISSN 0003-6951; 845524; TRN: US2213156
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 13; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; machining; stopping power; elastic modulus; glass; electronic excitation; nanomaterials; chemical elements; microscopy; ion beam analysis; aerogel

Citation Formats

Kucheyev, S. O., and Shin, S. J. Ion-beam-induced planarization, densification, and exfoliation of low-density nanoporous silica. United States: N. p., 2017. Web. doi:10.1063/1.4998193.
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Kucheyev, S. O., & Shin, S. J. Ion-beam-induced planarization, densification, and exfoliation of low-density nanoporous silica. United States. https://doi.org/10.1063/1.4998193
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Kucheyev, S. O., and Shin, S. J. Mon . "Ion-beam-induced planarization, densification, and exfoliation of low-density nanoporous silica". United States. https://doi.org/10.1063/1.4998193. https://www.osti.gov/servlets/purl/1810669.
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@article{osti_1810669,
title = {Ion-beam-induced planarization, densification, and exfoliation of low-density nanoporous silica},
author = {Kucheyev, S. O. and Shin, S. J.},
abstractNote = {Planarization of low-density nanoporous solids is challenging. Here, we demonstrate that ion bombardment to doses of ~1015 cm-2 results in significant smoothing of silica aerogels, yielding mirror-like surfaces after metallization. The surface smoothing efficiency scales with the ion energy loss component leading to local lattice heating. Furthermore, planarization is accompanied by sub-surface monolith densification, resulting in surface exfoliation with increasing ion dose. These findings have implications for the fabrication of graded-density nanofoams, aerogel-based lightweight optical components, and meso-origami.},
doi = {10.1063/1.4998193},
journal = {Applied Physics Letters},
number = 13,
volume = 111,
place = {United States},
year = {Mon Sep 25 00:00:00 EDT 2017},
month = {Mon Sep 25 00:00:00 EDT 2017}
}
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https://doi.org/10.1063/1.4998193
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