fig4

Figure 4. (A) Sensing mechanism of NiHCF-MIP NCs; (B) LSV curves of NiHCF-NIP-prepared yarns; (C) Preparation of carbon cloth coated with NiHCF-MIP NCs; (D) LSV curves and (E) linear-fitting data of the commercial carbon cloth prepared by drop-casting NiHCF-MIP NCs dispersion, and tested in blank and 1 nmol/L~10 μmol/L cortisol (n = 3, signifying 3 independent sensors). Error bars represent the SD of the mean from three sensors in (E). NiHCF: Nickel hexacyanoferrate; MIP: molecularly imprinted polymer; NCs: nanocubes; LSV: linear sweep voltammetry; SD: standard deviation.