  The Casimir-Polder interaction of ground-state and excited atoms with
graphene is investigated with the aim to establish whether graphene systems can
be used as a shield for vacuum fluctuations of an underlying substrate. We
calculate the zero-temperature Casimir-Polder potential from the reflection
coefficients of graphene within the framework of the Dirac model. For both
doped and undoped graphene we show limits at which graphene could be used
effectively as a shield. Additional results are given for AB-stacked bilayer
graphene.
