Abstract
We report a novel hydrothermal method for the synthesis of a Cu@C nanotube array on acentimeter-scale substrate for the first time. In this hydrothermal reaction process,employing the carbon coated ZnO nanorod array as an inexpensive and partially sacrificialtemplate, along with the ZnO dissolving in the alkaline atmosphere, the formed Cuparticles deposit and grow on the carbon surface gradually. Importantly, the carbon shell ofthe template is not only essential to the preservation of the array configuration, but alsomakes a significant contribution to the final nanostructure. Such a method provides amorphology-reservation transformation when various shaped carbon-containing templatesare adopted. Moreover, this designed Cu@C array has been demonstrated as anexcellent electrode material for an enzyme-free glucose sensor in terms of sensitivity (1200 µA mM − 1 cm − 2) and significantly lowerapplied potential (−0.2 V). Our results present the first preparation of the Cu@C composite nanotube array andmay open up an opportunity for rational design of advanced electrode materials forenzyme-free glucose sensors.
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