Alkane SelfAssembly pinpoint mode Semiconductor Holes LowDensityPolyethylene Vortex Piezoresponse LiftHeight ContactMode SFAs DNA FrictionalForce Forevision semifluorinated_alkanes OpticalWaveguide AlkaneFilm LiquidCrystal Battery TCS cross section Chrome Cancer Friction MechanicalProperties organic_polymer BlockCopolymer contact LithiumNiobate Ito HexagonalBN SmalScan Hair WWafer flakes