Surface nano morphology of two simultaneously Co coated MCLs: different nano-strings were generated. (a) Photo of a Co-coated MCL mounted in the STM sample holder for surface imaging. (b) STM image of the surface morphology of a Co-coated PA-MCL demonstrating the generation of the transverse nano-strings for the off-normal PLD. (c) STM image corresponding to the surface morphology of a Co-coated PE-MCL with the nano-strings in the longitudinal direction. These nano-scale patterns were visible in addition to the special elastic and mechanical properties of the MCLs.