DataStorage DOE fe_nd_b Array ScanningKelvinProbeMicroscopy MfmAmplitude Alkane PolyvinylideneFluoride Vortex HACrystal FastScan Materials HafniumDioxide Polydimethylsiloxane BCZT ContactModeDot Epoxy Jason Blend Sic CrAu BiVO4 SrO Electrode PpLdpe Sio2 MESA structure Wang Fluoride TiO2 temp HighAspect Hexylthiophene Boron hard_disk_media