Ultra-low-density silver aerogels via freeze-substitution

Fears, Tyler M.; Hammons, Joshua A.; Sain, John D.; Nielsen, Michael H.; Braun, Tom; Kucheyev, Sergei O.

doi:10.1063/1.5039521

Ultra-low-density silver aerogels via freeze-substitution

Journal Article · Thu Sep 13 00:00:00 EDT 2018 · APL Materials

DOI:https://doi.org/10.1063/1.5039521· OSTI ID:1471637

Fears, Tyler M. ^[1]; ^[1]; Sain, John D. ^[1]; Nielsen, Michael H. ^[1]; Braun, Tom ^[1]; Kucheyev, Sergei O. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

In this paper, we reported a method for fabricating <10 mg/cm³ silver aerogels via the freeze casting of aqueous nanowire suspensions followed by freeze substitution and supercritical drying. This method overcomes the limitations of traditional freeze drying and yields highly uniform, crack-free monoliths that undergo no measurable shrinkage with excellent mold reproduction. Significantly, freeze substitution enables the use of high concentrations of cryoprotectants to control the freezing process and, hence, the pore architecture of the resulting aerogels. Due to its physical nature, this method is applicable to the fabrication of materials with a broad range of compositions.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). The Molecular Foundry (TMF); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357; AC52-07NA27344

OSTI ID:: 1471637

Alternate ID(s):: OSTI ID: 1470779
OSTI ID: 1476854
OSTI ID: 1476867

Report Number(s):: LLNL-JRNL--745061; LLNL-JRNL--745888; LLNL-JRNL-745888

Journal Information:: APL Materials, Journal Name: APL Materials Journal Issue: 9 Vol. 6; ISSN 2166-532X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: ENGLISH

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Ultra-low-density silver aerogels via freeze-substitution

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