Enhanced ethanol sensing properties of TeO2/In2O3 core-shell nanorod sensors

► TeO2/In2O3 core-shell nanorods were fabricated. ► The core-shell nanorods showed enhanced sensitivity. ► The core-shell nanorods showed higher sensing speed than the pristine TeO2 nanorods. ► The origin of the enhanced sensing properties of the core-shell nanorods is discussed.