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Fig. 3 | Journal of Nanobiotechnology

Fig. 3

From: Electrophoretic deposition of ligand-free platinum nanoparticles on neural electrodes affects their impedance in vitro and in vivo with no negative effect on reactive gliosis

Fig. 3

Effect of coatings with platinum nanoparticles <10, 50 nm and mixture of both (mix) on the impedance of stimulation electrodes in vitro (a). Data are means + SEM measured before and after coating. Significant differences within groups are indicated as asterisks (*), difference between groups is indicated as circle (o; ANOVA with post hoc Tukey’s test p < 0.05). Schematic diagram of the impedance measurement set-up (b). The sinusodial test voltage UT drives the current im determined by the serial combination of Rm and the unknown microelectrode’s (ME) impedance. The voltage drop over Rm is amplified by α and registered as Uout. Optionally, the feedback capacity Cf compensates for bandwidth narrowing. Applying mesh rules the impedance of ME can be eventually calculated

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Journal of Nanobiotechnology

ISSN: 1477-3155

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