Ultralight Conductive Silver Nanowire Aerogels
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Science Directorate
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Engineering Directorate
- University of California, Santa Cruz, CA (United States). Department of Chemistry and Biochemistry
Low-density metal foams have many potential applications in electronics, energy storage, catalytic supports, fuel cells, sensors, and medical devices. Here in this work, we report a new method for fabricating ultralight, conductive silver aerogel monoliths with predictable densities using silver nanowires. Silver nanowire building blocks were prepared by polyol synthesis and purified by selective precipitation. Silver aerogels were produced by freeze-casting nanowire aqueous suspensions followed by thermal sintering to weld the nanowire junctions. As-prepared silver aerogels have unique anisotropic microporous structures, with density precisely controlled by the nanowire concentration, down to 4.8 mg/cm3 and an electrical conductivity up to 51 000 S/m. Lastly, mechanical studies show that silver nanowire aerogels exhibit “elastic stiffening” behavior with a Young’s modulus up to 16 800 Pa.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1393346
- Report Number(s):
- LLNL-JRNL--730883
- Journal Information:
- Nano Letters, Journal Name: Nano Letters Journal Issue: 12 Vol. 17; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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