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. 2019 May 10;5(5):eaaw2205. doi: 10.1126/sciadv.aaw2205

Fig. 5. Scalable color generation performance of eNPoM metasurfaces.

Fig. 5

(A) Schematic of eNPoM metasurface integrated into electrochemical cell. Right inset shows optical near-field enhancement of two eNPoMs built from 60-nm Au NPs, separated by mean distance gFF = 90 nm (given 20% fill fraction), showing no optical near-field coupling between the eNPoMs. (B) Corresponding simulated spectra. (C) Experimental scattering spectra of the eNPoM metasurfaces versus voltage applied from −0.3 ↔ 0.8 V. (D) DF images and (E) color gamut (CIE 1931 chromaticity) of the eNPoM metasurfaces built from 20-, 40-, and 60-nm-diameter Au NPs during PANI redox. (F) Color dynamics of eNPoM metasurface from (C) under ambient light before and after 3 months. Photo credit: J. Peng and H.-H. Jeong, University of Cambridge.