Trench HighAcpectRatio HydroGel Laser high_resolution NUS semifluorinated_alkane Pore MechanicalProperties Transparent Vanadate BariumTitanate TipBiasMode SiliconCrystal SmalScan Techcomp multi_layer Sadowski Chloroform UnivMaryland Temasek_Lab Collagen molecule HiVacuum Phase PetruPoni SThM ContactMode mechanical_property Self-assembledMonolayer SFAs Biofilm food Moire GlassTemperature