The present invention concerns a biomaterial comprising a nanofibrous scaffold made of polymers, such as poly(ε-caprolactone) or collagen, coated with at least one layer pair consisting of a layer of polyanions and a layer of polycations, wherein said at least one layer pair incorporates a therapeutic molecule such as a growth factor. The biomaterial may optionally comprise living cells such as osteoblasts and/or chondrocytes.