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Amyloid fibril‐based ultralow‐density aerogels are designed by functionalization with gold nanoparticles and microcrystals, leading to hybrids of unprecedented lightness and functionality. By changing the colloidal gold shape, size, and concentration, the gold composition can be tuned to reach contents ≥20 kt equivalent, yet at densities ≈103 lighter than any equivalent gold alloys, and combining...
A new class of ultralight gold materials is produced by combining amyloid fibrils with gold nanoparticles, as described by R. Mezzenga and co‐workers on page 472. The gold content of up to 20 karat equivalent allows the preservation of the optical properties of traditional gold alloys, yet at densities thousands of times lighter. By changing the colloidal gold shape, size, and concentration, the composition...
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