Small-scale clustering of nano-dust grains in turbulent interstellar
  molecular clouds [Extended version]
  Clustering and dynamics of nano-sized particles (nano dust) is investigated
using high-resolution ($1024^3$) simulations of compressible isothermal
hydrodynamic turbulence, intended to mimic the conditions inside cold molecular
clouds in the interstellar medium. Nano-sized grains may cluster in a turbulent
flow (small-scale clustering), which increases the local grain density
significantly. Together with the increased interaction rate due to turbulent
motions, aggregation of interstellar nano-dust may be plausible.
