atomic_steps Beads AAO Gallium Pattern Piranha HfO2 HiVacuum ForceDistanceSpectroscopy Phthalocyanine Monisha PinpointNanomechanicalMode StrontiuTitanate CrAu IIT-chennai CBD AM_KPFM MfmPhase MolybdenumDisulfide layers LiftHeight MechanicalProperties India Polystyrene light_emitting KAIST LateralPFM Layer Graphene PtfeFilter HighAspect bias_mode Indium_tin_oxide FailureAnlaysis NCM\