Fig. 6.

The IV curves of DI water when a relatively nonpolar oil has been added to change its surface tension while decreasing its permittivity only slightly. As it can be seen, by increasing the oil concentration the IV curve moves to left indicating the effect of DI water is felt more by the device. Put differently, water has been able to enter the pores and change the IV curve although the permittivity of the solution has decreased by the addition of the oil. The IV curve when only oil is poured on the sample does not change much compared to other liquids.