## 3 Molecular Imprinting by Electropolymerization
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Synthesis Method** & **Receptor** & **Support** & **Analyte** & \multicolumn{2}{c}{**Electrochemical**} & \multicolumn{1}{c}{**LOD**} & **Refs.** \\ \hline CV 1  & MIP film & Au electrode 2  & Acetaminophen & CV, EIS 3  & SWV 4  & 2.3 \(\times 10^{-9}\) M & [72] \\ CV & MIP film & GCE 5  & DPV 6  & 10\({}^{-10}\) M & [73] \\ Continostatic conditions & MIP film & Au electrode & Erythromycin & DPV & \(1\times 10^{-10}\) M & [74] \\ CV & MIP film & Au electrode & Tetracycline & LSV 7  & 2.2 \(\times 10^{-16}\) M & [75] \\ CV & MIP film & GCE & Sunset yellow & CV & \(5\times 10^{-9}\) M & [76] \\ CV & MIP film & GCE & Tetra-bromo- & DPV & \(2.7\times 10^{-10}\) M & [77] \\ CV & MIP film & Modified & Resveratrol & CV and EIS & \(7.1\times 10^{-12}\) M & [78] \\ CV & MIP film & ITO 8  electrode & Atrazine & CV and DPV & \(1\times 10^{-9}\) M & [79] \\ CV & MIP film & Au electrode & Sodium lauryl sulfate & CV, DPV and EIS & \(1.8\times 10^{-10}\) g/L & [80] \\ CV & MIP film & SPCE 9  & Diclofenac & DPV & \(2\times 10^{-7}\) M & [81] \\ CV & MIP film & GCE & Epinephrine & CV and DPV & \(7.6\times 10^{-8}\) M & [82] \\ CV & MIP film & Modified SPCE & Naloxone & DPV & \(2\times 10^{-7}\) M & [83] \\ CV & MIP film & Modified SPCE & Naloxone & DPV & \(1.6\times 10^{-7}\) M & [84] \\ CV & MIP film & Screen-printed & Methylone & SWV & \(1.1\times 10^{-6}\) M & [85] \\ CV & MIP film & GCE & Resonance & & \\ CV & MIP film & Cr/Au film & Melamine & Wavelength Modulation & \(5.1\times 10^{-12}\) M & [86] \\ CV & MIP film & GCE & Melamine & CV and SWV & \(4.47\times 10^{-10}\) M & [87] \\ CV & MIP film & Modified GCE & Asulam & CV, DPV and EIS & \(1.7\times 10^{-13}\) M & [88] \\ CV & MIP film & ITO electrode & Luteolin & DPV & \(2.4\times 10^{-8}\) M & [89] \\ CV & MIP film & Modified electrode & & & \\ CV & MIP film & based on graphene & 4-nonylphenol & CV and DPV & \(0.01\) ng\(\cdot\)mL\({}^{-1}\) & [90] \\  & and HAuCl\({}_{4}\) & & & & \\ CV & MIP film & GCE & Anthracene & SWV & \(1.2\times 10^{-8}\) M & [91] \\ CV & MIP film & SPCE & Cocaine & SWV and EIS & \(2.9\times 10^{-9}\) M & [92] \\ CV & MIP film & GCE & Entacapone & EIS and DPV & \(5\times 10^{-8}\) M & [93] \\ \hline \hline \end{tabular}
\end{table} 
Table 2: MIP-based sensors obtained by electropolymerization. detection in aqueous solutions [74]. Another research group prepared an electrochemical sensor for tetracycline detection [75]. Theywere able tosynthesize an MIP film by electropolymerization on the surface of the gold electrode surface. A three-electrode system consisting of Au electrode (working electrode), saturated calomel electrode (reference electrode) and a platinum (Pt) electrode (counter electrode), was used in the electropy-merization process. A first step involved in synthesizing gold nanoparticles, further used in the development of the sensor. The films were prepared by CV upon applying a potential between 0.35 and 0.8 V, at a scan rate of 100 mV/s, for 10 scan cycles, after which the conditions were changed to a fixed potential (0.8 V). The performance of the sensor was studied by linear sweep voltammetry (LSV) and indicated quite high sensitivity, down to 0.22 fM tetracyclinein aqueous solutions [75]. Given the toxic effect of dyes on human health, controlling their presence in the food becomes mandatory. Thus, [PERSON] et al. [76] proposed the development of an electrochemical sensor based on an MIP layer that can be used for food analysis. In this case, the authors used a three-electrode system consisting of a working electrode (functionalized GCE), reference electrode (saturated Ag/AgCl electrode) and counter electrode (Pt electrode). MWCNTs were used for the functionalization of the GCE.