self_healing HumanHair Force-distance TempControl Indium_tin_oxide PrCurve China LaAlO3 SelfAssembly Thermoplastic_polyurethane HexagonalBN DomainSwitching University_of_Regensburg OxideLayer BiasMode Calcium LiftHeight Insulator SiWafer nanobar KelvinProbeForceMicroscopy Morphology Ucl Graphite PFM MultiLayerCeramicCapacitor hard_disk_media PinPointMode Composite GaN Mechanical Gallium FM_SKPM Yeditepe ScanningKelvinProbeMicroscopy