SPMLabs Gong FrictionalForce ForceDistanceSpectroscopy SKPM OpticalWaveguide HighAspect Writing #EC SICM single_layer DLaTGS Wonseok Epoxy Pattern STM DOE PolyvinylAcetate Water WS2 PVAP3HT Ceramics Device NiFe SRAM InorganicCompound Iron block_copolymer CuParticle rubber Mechinical NtuEee NUS_NNI_Nanocore Modulus HBN