single_layer tip_bias_mode PrCurve graphene_hybrid Biology Au111 polyvinyl acetate Edwin Piezo C36H74 Typhimurium Temasek_Lab Composite Switching Sapphire Ni81Fe19 HexagonalBoronNitride CastIron Film Lateral_Force_Microscopy HafniumDioxide Sulfur ito_film DOE mechanical property Pvdf Conduct STM Reduction PS_LDPE CeramicCapacitor Potential Magnetostrictive nanomechanical NUS_NNI_Nanocore