nanomechanical Carbon nanobar IVSpectroscopy Chungnam_National_University #Materials FAPbI3 PinpointPFM dichalcogenide Electronics Plug Leakage LifeScience Praseodymium ContactModeDot Tape Modulus China Pinpoint PFM atomic_steps Layer Korea Protein Transparent SoftSample block_copolymer Mechanical SAM LaAlO3 Bacteria MfmPhase Mechinical GaP thermal_property BoronNitride