  We theoretically analyse the possibility to electrostatically confine
electrons in circular quantum dot arrays, impressed on contacted graphene
nanoribbons by top gates. Utilising exact numerical techniques, we compute the
scattering efficiency of a single dot and demonstrate that for small-sized
scatterers the cross-sections are dominated by quantum effects, where resonant
scattering leads to a series of quasi-bound dot states. Calculating the
conductance and the local density of states for quantum dot superlattices we
show that the resonant carrier transport through such graphene-based
nanostructures can be easily tuned by varying the gate voltage.
