ContactModeDots norganic Optical mono_layer IcelandSpar SiliconCrystal Croatia temperature controller AFM AM_SKPM CrAu Graphite Pores Hafnia Pore light_emitting IMT_Bucharest 2d_materials SFAs PhaseChange FloppyDisk WWafer nanomechanical CuFoil single_layer SRAM EFMAmplitude exfoliate MechanicalProperties PetruPoni_Institute TemperatureControllerAFM Sadowski I-VSpectroscopy PinPointMode HexagonalBN piezoelectric force microscopy