Hydroxyl radical assisted enzyme-free electrochemical detection and oxidation of cholesterol by a galvanically deposited layer-by-layer ZnO/WO3 thin film nanocomposite

A facile low-cost two-step galvanic technique is employed to deposit a lbl ZnO/WO 3 thin film nanocomposite on FTO substrate for an efficient electrochemical oxidation of cholesterol to oxysterol and thereby sense it through ˙OH radical formation.