Reduced to Hierarchy: Carbon Filament-Supported Mixed Metal Oxide Nanoparticles

[Image: see text] We describe a one-pot synthesis method for carbon filament-supported mixed metal oxide nanoparticles. The thermal intracrystalline reaction of adamantanecarboxylate ions confined inside interlayer galleries of layered double hydroxide materials under a reducing atmosphere (H(2)) leads to carbon filaments forming in situ within the material. Raman spectroscopy and combined microscopy techniques show the formation of hybrid organic–inorganic carbon filaments with the mixed metal oxide particles interleaved.