IMT_Bucharest GaP dielectric trench HumanHair nanobar Solar Hexylthiophene Formamidinium_lead_iodide CuSubstrate PDMS heterojunctions Ecoli Dental PVAP3HT EvatecAG Oxidation Fiber DIWafer ScratchMode SingleLayer AtomicSteps Polyvinylidene Electical&Electronics Annealed TPU ScanningKelvinProbeMicroscopy SiWafer HBN fe_nd_b Conductance molecule Sapphire Mechanical NUSNNI Global_Comm