▎ 摘　　要

The electronic and quantum transport properties of AB-stacked bilayer graphene nanoribbons with various types of chemical and structural modifications are investigated numerically. First-principles calculations evidence that, for parallel ribbons separated by the typical graphitic van der Waals-bond distance, the modification of one ribbon affects the electronic structure of both layers. Oxygen atoms in epoxide configuration, sp(3)-type defects, p- and n-type doping and StoneWales defects are found to enhance the interlayer coupling, introduce quasi-bound states that extend over both ribbons, and affect the conductance of the bilayered network. Most of the impurities exhibit an acceptor-like character that leads to asymmetric electronhole transmission profiles, providing the possibility of creating mobility gaps that are nearly independent of the type of external modification.