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. Author manuscript; available in PMC: 2016 Feb 21.
Published in final edited form as: Lab Chip. 2015 Feb 21;15(4):1038–1049. doi: 10.1039/c4lc01254b

Figure 4.

Figure 4

(a) Conductance plots for assembled devices with a plasma treated PMMA substrate bonded to a plasma treated PMMA cover plate, PL-PMMA/(PL-PMMA), and plasma treated PMMA substrate bonded to a plasma treated COC cover plate, PL-PMMA/(PL-COC). (b) Conductance plots for hybrid devices consisting of an untreated PMMA substrate bonded to a plasma treated COC cover plate, U-PMMA/(PL-COC), before (blue trace) and after (red trace) UV/O3 activation. The devices used in all cases consisted of an array of five nanoslits (5 µm wide, 120 nm deep and 148 µm long) connected to V-shaped access microchannels at the input and output ends. Each data point represents an average of five measurements with scatter in the data within 5–8% of the mean value. The solid black line represents the trace of the theoretical bulk conductance. (c) Plot showing the relationship between the conductance and the electrolyte pH for assembled hybrid devices before (black) and after (red) UV/O3 activation. 10−4 M KCl solution adjusted to a pH between 5.0 and 9.1 was used in the study.