non_contact PECurve dichalcogenide Piezoelectric Ecoli Polyimide Water WS2 SiliconeOxide Hydroxyapatite MetalCompound Jason Hexatriacontane TriGlycineSulphate Blend Molybdenum_disulfide PtfeFilter Epoxy Writing Current HardDiskMedia CntFilm Conductive AFM Vanadate BlockCopolymer alkanes Regensburg Polymer Fendb hard_disk_media FloppyDisk Hexylthiophene Ceramics Device Metal