Enhanced Electroactivity of Facet-Controlled Co3O4 Nanocrystals for Enzymeless Biosensing
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2016年第1期
论文作者：Kuang-Hsu Wu Xue Leng Ian R.Gentle Da-Wei Wang
文章页码：24 - 27
摘 要：In this work,we report enhanced electroactivity of Co3O4 nanocrystals（nanocubes,NCs and truncated nano-octahedra,TNO） on the exposed {111} facets as compared to the {001} facets in relation to the surface density and the activity of the octahedral CoIII species. Transmission electron microscopy,X-ray powder diffraction,X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were employed to characterize the crystal facets and materials properties. The enhanced electroactivity of {111} crystal facets was evaluated by cyclic voltammetry and amperometric titration. Our results indicate that the {111} facets in TNO has a better electroactivity for enzymeless glucose sensing with a decent glucose sensitivity of 32.54 μA（mmol/L）-1cm-2.
Kuang-Hsu Wu1，Xue Leng1，Ian R.Gentle1，Da-Wei Wang1,2
1. School of Chemistry and Molecular Biosciences,the University of Queensland2. School of Chemical Engineering,the University of New South Wales
摘 要：In this work,we report enhanced electroactivity of Co3O4 nanocrystals（nanocubes,NCs and truncated nano-octahedra,TNO） on the exposed {111} facets as compared to the {001} facets in relation to the surface density and the activity of the octahedral CoIII species. Transmission electron microscopy,X-ray powder diffraction,X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were employed to characterize the crystal facets and materials properties. The enhanced electroactivity of {111} crystal facets was evaluated by cyclic voltammetry and amperometric titration. Our results indicate that the {111} facets in TNO has a better electroactivity for enzymeless glucose sensing with a decent glucose sensitivity of 32.54 μA（mmol/L）-1cm-2.
关键词：
