Facile growth of single-phase perovskite CaRuO₃ nanofibers as selective electrochemical detection of ascorbic acid

We report a facile synthesis of single-phase perovskite CaRuO₃ nanofibers via electrospinning process followed by the thermal annealing for the sensitive detection of L-ascorbic acid (AA) for the first time. The structure of the obtained CaRuO₃ nanofibers represents single-phase orthorhombic crystalline phase with the rough surface texture and the average diameter of 139 nm. The electrocatalytic activities of CaRuO₃ nanofibers for AA oxidation were measured via linear sweep voltammetry and amperometric response in 0.05 M PBS containing 1 mM AA, resulting in high sensitivity of 290.4 μA mM⁻¹ cm⁻². CaRuO₃ nanofibers could be thus utilized for analyzing AA selectively in various complex biological and/or physiological systems.