HDD AIN cross section Zhi Crystal Switching KelvinProbeForceMicroscopy biocompatible Pinpoint Composite BlockCopolymer ScanningThermalMicroscopy ForceDistanceSpectroscopy Piranha HardDisk amplitude_modulation DLaTGS IVSpectroscopy TipBiasMode FrictionForce Polyaniline Magnetostrictive light_emitting IndiumTinOxide EFMAmplitude Aluminum Chromium Domain Formamidinium_lead_iodide Friction HfO2 CrAu Holes Bacterium ScanningKelvinProbeMicroscopy