bias_mode GaAs Composite HighAcpectRatio Solution Grain Modulus Vinylpyridine Fluoride oxide_layer Film Patterns Hafnium_dioxide PetruPoni_Institute DomainSwitching Nanostructure CrossSection Pores Plug Metal Indium_tin_oxide cross section Crystal FrictionalForce LowDensityPolyethylene Piezo molecule Writing Polydimethylsiloxane SiliconCrystal PolyStylene AnodizedAluminumOxide Cell ConductiveAFM cannabis