nanobar Dr.JurekSadowski Piezoresponse INSPParis Reading Ferrite PFM Zhi LogAmplifier ring shape Permalloy LiquidCell Bacteria Mobile Electical&Electronics Fluoride SPMLabs suspended_graphene Ferroelectric Mosfet Pinpoint PFM Hafnia Composite ItoGlass TappingMode SolarCell MolecularSelfAssembly Wang PhaseImaging BiFeO3 organic_polymer ContactModeDot LifeScience ito_film NUS