Ion transport in mesoporous silica SB A-16 films was investigated. Thin films of SB A-16 were synthesized on Si substrates via dip-coating method. SEM analysis revealed that SBA-16 films with highly ordered 3D-cubic pore structure were uniformly coated on Si substrates. After the mesopores of a SBA-16 film were filled with pure water, the ionic current passing through the pores was measured by applying electric field. The measured current-voltage (I-V) curve was non-liner and the measured current was larger than the theoretical prediction. This study discusses the relationship between the non-liner I-V curve and the ionic flow inside ink-bottle shaped pores.
