  Room temperature ionic liquids are salts which are molten at or around room
temperature without any added solvent or solution. In bulk they exhibit glass
like dependence of conductivity with temperature as well as coupling of
structural and transport properties. Interfaces of ionic liquids have been
found to induce structural changes with evidence of long range structural
ordering on solid-liquid interfaces spanning length scales of $10-100$nm. Our
aim is to characterize the influence of confinement on the structural
properties of ionic liquids. We present first conductivity measurements on
ionic liquids of the imidazolium type in single conical glass nanopores with
confinements as low as tens of nanometers. We probe glassy dynamics of ionic
liquids in a large range of temperatures ($-20$ to $70^\circ$C) and nanopore
opening sizes ($20-600$nm) in silica glass nanocapillaries. Our results
indicate no long range freezing effects due to confinement in nanopores with
diameters as low as $20$nm. The studied ionic liquids are found to behave as
glass like liquids across the whole accessible confinement size and temperature
range.
