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Present work reports a simple, cost-effective and facile approach for electrochemical sensing of 2-nitrophenol (2-NP) as the model analyte using silver thin film electrodes. Thickness controlled silver thin films are grown on ITO glass substrates at 400 • C for varying deposition times of 10-45 minutes using methanol solution of silver triflouroacetate (Ag(CF 3 COO)), via aerosol assisted chemical vapor deposition (AACVD). XRD, XPS, SEM and EDX analysis of the films verified the presence of crystalline and phase pure elemental silver with micro/nanometer dimensions whereas a growth pattern from spherical nanoparticles to continuous thin films is observed over time. All Ag-electrodes were used to investigate the electrochemical behavior of 2-NP by cyclic voltammetry (CV) while the quantitative profiling was done by LSV. The results indicate that the Ag-electrode developed in 30 min manifested excellent electrocatalytic activity toward 2-NP reduction, thereby lowering the reduction overpotential and increasing the reduction current which is attributed to the percolated metallic network in its micro/nanostructure. This particular electrode exhibited a dynamic range = 50-450 μM, detection limit = 12 nM, and high selectivity from potential interfering agents, a performance much better than the available thin film sensors and Ag-disk electrode.

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