piezoelectric force microscopy Led Display DNA Sadowski LiquidCell TCS silicon_oxide ForceVolumeImage CntFilm Leakage Platinum BiasMode Spain FM_KPFM NeodymiumMagnets FrequencyModulation Pyroelectric Change Solution SrTiO3 KelvinProbeForceMicroscopy HexacontaneFilm Zhi medical ThermalConductivity AtomicSteps Polyaniline Bacteria UnivCollegeLondon AtomicLayer ScanningTunnelingMicroscopy BismuthFerrite Polyimide PolyvinylAcetate