  We investigate the electronic transport properties of a folded graphene
nanoribbon with monolayer nanoribbon contacts. We consider two possible
foldings: either the nanoribbon can be folded onto itself in the shape of a
hairpin with the nanoribbon leads at a $0^\circ$ angle, or the monolayer
contacts have different directions, forming a $60^\circ$ angle. The system is
described by a single $\pi$-band nearest-neighbor tight-binding Hamiltonian
taking into account curvature effects. We have found that for the case of a
nanoribbon folded over itself the conductance oscillates from almost zero and a
finite value depending on the coupling between contacts, whereas in the
$60^\circ$ angle folding the conductance is only slightly perturbed, allowing
for the connection of graphene nanoelectronic components in a variety of
geometries.
