Fig. 1From: Optical Constants and Band Gap Evolution with Phase Transition in Sub-20-nm-Thick TiO2 Films Prepared by ALDAFM micrographs of as-deposited TiO2 ultrathin films with different thicknesses. a 50 cycles. b 100 cycles. c 200 cycles. d 300 cycles. e 400 cycles. f 500 cycles. g 600 cycles. h Trend chart of roughness and thickness for the seven samplesBack to article page