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. 2017 Apr 7;12:262. doi: 10.1186/s11671-017-2030-z

Fig. 2.

Fig. 2

Water CA measurements of a the as-grown WS2 films on Al2O3 and SiO2/Si substrates and of b the same samples after 20 days. Dashed lines indicate the CA values of bare Al2O3 (green) and SiO2/Si (red) substrates