Journal
NANO LETTERS
Volume 18, Issue 4, Pages 2519-2524Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b00194
Keywords
Vanadium pentoxide; lightweight materials; ice templating; mechanical damping
Categories
Funding
- DFG [BI 469/17-2, BU 2713/2-1]
- Baden-Wurttemberg Stiftung
- International Max-Planck Research School for Condensed Matter Science
- Landesgraduiertenforderung
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The demand to outperform current technologies pushes scientists to develop novel strategies, which enable the fabrication of materials with exceptional properties. Along this line, lightweight structural materials are of great interest due to their versatile applicability as sensors, catalysts, battery electrodes, and acoustic or mechanical dampers. Here, we report a strategy to design ultralight (rho = 3 mg/cm(3)) and hierarchically structured ceramic scaffolds of macroscopic size. Such scaffolds exhibit mechanical reversibility comparable to that of microscopic metamaterials, leading to a macroscopically remarkable dynamic mechanical performance. Upon mechanical loading, these scaffolds show a deformation mechanism similar to polyurethane foams, and this resilience yields ultrahigh damping capacities, tan delta, of up to 0.47.
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