NtuEee IIT-chennai NUS hetero_structure WWafer PatternedSapphireSubstrat Edwin UnivCollegeLondon TempControl Vinylpyridine PhthalocyaninePraseodymium temp Oxide Copper Nanostructure PVAC DNA Yeditepe_University Ferrite Silicon PolyStylene thermoplastic_elastomers Cross-section CP-AFM silicon_oxide Nanotechnology blended polymers ScanningIon-ConductanceMicroscopy GaP PhaseImaging ForceMapping Forevision BaTiO3 Wonseok Wildtype