mechanical property Optical rubber Croatia Gallium_Arsenide DNAProtein HexagonalBN Fet NUS_NNI_Nanocore Solution Led GalliumPhosphide silicon_carbide CaMnO3 Bacteria FrictionalForceMicroscopy non_contact FailureAnlaysis Ni81Fe19 Singapore PhaseImaging Reduction thermoplastic_elastomers Potential ThinFilm HOPG HiVacuum graphene_hybrid F14H20 Fiber LFM fluorocarbon Friction FrictionForce PolyimideFilm