NUS_Physics H-BN Defects HBN Optical Etch SAM PS_LDPE PhaseChange Sulfur CVD CP-AFM Optoelectronic Force-distance epitaxy Adhesive Polytetrafluoroethylene Calcium Mobile Worcester_Polytechnic_Institute thermoplastic_elastomers Plug cooling ForceMapping OpticalModulator 2-vinylpyridine CalciumHydroxide Carbon SThM multi_layer STO Conduct Optoelectonics LiftHeight IMT_Bucharest