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. Author manuscript; available in PMC: 2008 Sep 4.
Published in final edited form as: Nano Lett. 2006 May;6(5):1013–1017. doi: 10.1021/nl060313d

Figure 5.

Figure 5

Time variation of the impedance (at 1 kHz) of nanoporous filter membranes. The membranes were initially in the spiropyran form, and irradiation at 337 nm was begun at 400 s. Shown are an unmodified filter (E) and filters having undergone surface modifications based on mixtures of decanoic acid and spiropyran acid reacting with the aminated surface: A - pure decanoic acid, B – a 3:1 mixture of decanoic acid and spiropyran, C - a 2:1 mixture of decanoic acid and spiropyran, D - pure spiropyran. Measurements were done in 1.0 M KCl.