Pvdf PUR LiquidImaging Polystyrene Polymer LDPE temperature controller AFM LiftHeight SrTiO3 IISCBangalore Annealing PDMS CrystalGrowing Mobile PvdfBead atomic_steps Polyethylene STO ForceVolumeImage SetpointMode TiO2 BariumTitanate Butterfly Ucl StrontiuTitanate gallium_nitride SrO fifber LiIonBattery Graphene Ni-FeAlloy LowDensityPolyethylene FrictionalForceMicroscopy GranadaUniv MoirePattern