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(A) DPV of the chemosensor in the presence of ACR. The ACR concentration (a–f) was used as follows: (a) Control (b) 1 × 10−8 M, (c) 1 × 10−6 M, (d) 1 × 10−5 M, (e) 1 × 10−4 M, (f) 1 × 10−3 M; (B) The calibration curve of standard ACR with R2 = 0.993. (C) A representative SEM micrograph of the chemosensor surface after its exposure to ACR with an estimated surface roughness of 0.24 µm.
