Tapping ConductiveAFM GaP LiftHeight LightEmission ItoGlass DLaTGS UnivCollegeLondon Formamidinium_lead_iodide Zagreb Vacuum ScanningTunnelingMicroscopy Materials organic_polymer Gong blended polymers BismuthFerrite ConductingPolymer cross section Wafer LowDensityPolyethylene Electrode CeNSE_IISc Spincast hydrocarbon Celebration ForceDistanceSpectroscopy hard_disk_media tip_bias_mode Christmas cannabidiol Monisha LeakageCurrent ForceVolume Neodymium