Layer-by-Layer of Thin Films of Nickel Hexacyanoferrate Multilayer Anchored to Self-Assembled of Mercaptoacetic Acid

Abstract

A general methodology to prepare redox active inorganic mutilayers consisting of nickel hexacyanoferrate layers formed by layer-by-layer assembly was constructed. The layers were anchored through mercaptoacetic acid on gold electrode. The electrochemical characteristics of nickel hexacyanoferrate modified electrode in the presence of different ions (K⁺, Na⁺, Cl^–, Br^– and F^–) were investigated by cyclic voltammetry and exhibited a near-Nernstian with a slope of 54 mV/decade to potassium ions in the range from 1 × 10^-2-1 mol/L, which can be use as potential sensor to determine concentration of potassium ion. The modified electrodes showed good stability.