Temperature fluorocarbon Topography Sperm HighResolution ImideMonomer Tin sulfide ForceVolume EFM SiliconCrystal Hexatriacontane NUS IIT-chennai HanyangUniv optoelectronics Pattern sputter Growth Writing aluminum_nitride CHRYSALIS_INC PolyvinylideneFluoride PFM AAO ULCA Lateral_Force_Microscopy Etch ScanningKelvinProbeMicroscopy MultiferroicMaterials CrystalGrowing dichalcogenide molecule tip_bias_mode cross section TempControl