Catalyst-free chemical vapor deposition is used to form thin (1–2 nm) carbon layers on the surface of alumina
nanofibers resulting in carbon-alumina nanocomposites. Thermal analysis, X-ray fluorescent microanalysis,
Raman spectroscopy, and electrical resistance measurements of these composites show that increasing of
synthesis time not only increases the amount of carbon on alumina surface, but also the ordering and density of
the carbon layers. Nitrogen adsorption data reveal the decrease of total pore volume with increasing the
synthesis time. The obtained composite material could be employed for the preparation of ion-selective membranes
with switchable ion transport, electroconductive ceramics, and electrochemical sensors.