Fig. 4
From: Thermally-drawn fibers with spatially-selective porous domains
Transverse ionic transport measurement through impedance spectroscopy of ionic liquid-filled porous core fibers. (a) Optical micrograph of fiber sample displaying a porous core filled with a 10−3 m PYR13TFSI in propylene carbonate solution, adjacent CPEs and contiguous Bi-In metal buses. (b) Simple equivalent circuit expected from fiber samples. CPA refer to Constant Phase Angle elements. (c) Photograph of a connected fiber sample. (d) Impedance spectra for a fiber between 12 and 1 cm, sequentially cut by 10 mm decrements. Solid lines are fittings results with equivalent circuit. The inset shows the dependence of R Gel as a function of the inverse-length of the fiber and shows a linear relationship, as expected from geometric considerations
