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. 2022 Jun 15;249:123687. doi: 10.1016/j.talanta.2022.123687

Fig. 4.

Fig. 4

The morphology characterization of the graphene-CRISRP biosensor. (a) SEM for membrane, I to III representing for pristine graphene, the graphene/chitosan modified biosensor, the graphene/chitosan biosensor after incubation in PBS (37 °C, pH 7.4, 75 min). (b) The reproducibility of the graphene modified electrode under different scanning cycles, the graphene/chitosan drop-casted on the surface of the electrode, incubation in 60 °C for 30 min, scanning potential range from −0.2 V to 0.6 V at a scan rate of 50 mV/s in a 0.05 M K3[Fe(CN)6]/K4[Fe(CN)6] solution containing 0.50 M KCl, n = 3. (c) Three-dimensional images of the graphene membrane measured by a stylus profiler, 0.05 mg loading force, 0.1 mm/s scanning speed. (d) Row data of the stylus profiler measurement for graphene membrane. (e) Characterization of multifunctional probe [Ru(phen)2dppz]BF4, FTIR spectrum of synthesized [Ru(phen)2dppz]BF4, –C Created by potrace 1.16, written by Peter Selinger 2001-2019 N- of dppz at 1362 cm−1, –C Created by potrace 1.16, written by Peter Selinger 2001-2019 N- of Ru(phen)2Cl2 at 1422 cm−1, the dppz ligand of [Ru(phen)2dppz]BF4 red-shifted at 1356 cm−1, the phen ligand of [Ru(phen)2dppz]BF4 blue-shifted at 1427 cm−1.