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ring shape frequency_modulation DeoxyribonucleicAcid Pores FFM Wang SFAs SingleLayer MoirePattern Composite ScanningSpreadingResistanceMicroscopy GaAs layers SKPM Temperature Ram FrequencyModulation AM-KPFM CBD Crystal Aluminium_Oxide PolymerPatterns block_copolymer PinpointNanomechanicalMode Scratch Spain Gold Inorganic_Compound LightEmiting BiFeO3 rubber TriGlycineSulphate Permalloy Ceramics Switching