Composite SingleLayer light_emitting BTO MultiferroicMaterials SICM KelvinProbeForceMicroscopy pulsed_laser_deposition Ceramic single_layer AIN Protein HighResolution PolyimideFilm Nanopattern blended polymers TappingMode FrictionForce Worcester_Polytechnic_Institute nanomechanical NUS atomic_layer AdhesionEnergy Calcium TransitionMetal IndiumTinOxide Sphere self_assembly WS2 ForceMapping MechanicalProperties #Materials molecules Sio2 NUS_Physics