Bioengineering of one dimensional hierarchical CuS hollow nanotubes for non-enzymatic glucose sensing applications.

Herein, a novel and facile eco-friendly green chemistry approach has been devised at room temperature for synthesis of 1D hierarchical CuS hollow nanotubes on Cu substrate volatile organosulfur compounds from L for non-enzymatic glucose detection. Field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and X-ray spectroscopy (XPS) were employed to characterize the surface morphology, structural phase, compositional, and chemical states of the obtained samples, respectively. The SEM results confirm the formation of 1D hierarchical CuS hollow nanotubes. The XRD patterns are indexed to orthogonal anilite CuS crystal planes and the EDX spectra clearly reveal the presence of Cu and S elements. XPS spectra confirms peaks of Cu 2p and S 1s core levels, which are typical characteristics of Cu(i) and S(ii), respectively. The Brunauer-Emmett-Teller (BET) specific surface area for obtained CuS hollow nanotubes is 2.07 m g with a pore size distribution of 27.90 nm. Using CuS hollow nanotubes, the detection of non-enzymatic glucose was conducted over a dynamic range of concentrations from 0.5 to 100 μmol L and reveals a high sensitivity of 1058.33 μA mMcm and a limit of detection (LOD) of 0.127 μmol L. The obtained results indicated that CuS hollow nanotubes are promising candidates for non-enzymatic glucose detection.