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. 2020 Oct 14;224:121769. doi: 10.1016/j.talanta.2020.121769

Fig. 5.

Fig. 5

DI water has a relative permittivity as about twice as methanol does but its IV curve does not change as much compared to that of methanol. The threshold voltage has decreased only by about half a volt compared to the threshold voltage of methanol changed by about 3.5 V as compared to the air (Fig. 4). This is due to the surface tension of water, which prevents it from completely entering the pores.