  Photoionization as a half-scattering process is not instantaneous. Usually,
time delays in photoionization are of the order of few tens of attoseconds (1
as = 10$^{-18}$ s). While going from a single atom to a nano-object, one can
expect the delay to increase since the photoelectron scatters over a larger
distance. Here, we show that this is no longer valid in the case of planar
systems. Using attosecond interferometry, we find that the time delay in a 2D
carbon-based molecule, naphthalene, is significantly smaller compared to its 3D
diamond-like counterpart, adamantane. The measured time delay carries the
signature of the spatial distribution of the hole created in the residual
molecular cation, allowing us to obtain its dimensions with angstrom accuracy.
Our findings offer novel opportunities for tracking and manipulating ultrafast
charge transport in molecular materials.
