dichalcogenide Sphere ForceVolumeImage Tin disulfide KAIST DomainSwitching Bmp LowDensityPolyethylene AM_KPFM PinpointPFM VerticalPFM Writing Nanotechnology BoronNitride HanyangUniv SurfaceOxidation PinPointMode Pores Christmas BTO Liquid CrossSection Neodymium CaMnO3 LMF Semiconductor tip_bias_mode PS_PVAC DLaTGS TCS LaAlO3 HighAcpectRatio MechanicalProperties Al2O3 semifluorinated alkane