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

Title: 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.

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

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

Grant/Contract Number:: AC52-07NA27344; AC02-06CH11357; AC02-05CH11231; 18-ERD-032

OSTI ID:: 1471637

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

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

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

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

Country of Publication:: United States

Language:: ENGLISH

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Cited by: 12 works

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Nanoparticles
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Title: Ultra-low-density silver aerogels via freeze-substitution

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