Research Advances

摘要

Metals that float on water? A relatively new group of materials—metal foams—do exactly that, defying the conventional notion of metals as heavy and solid. Metal foams are mere wisps, consisting of more than 80% air. Having very high surface areas and continuous open-cell porosity, they are finding applications in catalysis, surface enhanced Raman scattering (SERS), heat transfer, insulation, and other areas.