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(A) A typical SEM micrograph of bare gold electrode decorated by gold nanoparticles. (B) An SEM micrograph depicts the self-assembly of DTT to AuNPs of the Au/AuNPs electrode. (C) DPV of the Au/AuNPs/DTT electrode in 0.1 M phosphate buffer at 4 different pHs. (D) Current intensity of the electrode at different pHs, 6.0 to 8.0.
