Non-ContactMode Collagen Flake Polyaniline SSRM Conductivity kelvin probe force microscopy CalciumHydroxide multi_layer Copolymer conductive Force-distance NUSNNI TemperatureControlledAFM Tungsten MoS2 Array TriGlycineSulphate Inorganic_Compound ShenYang Change PyroelectricDetector GaN Domain Electrical&Electronics Subhajjit Global_Comm Ptfe Resistance Ram Photovoltaics Monisha thermal_property SmalScan PVAP3HT