Enhanced Electroactivity of Facet-Controlled Co3O4 Nanocrystals for Enzymeless Biosensing  

作　　者：Kuang-HsuWu Xue Leng Ian R. Gentle Da-Wei Wang 

机构地区：[1]School of Chemistry and Molecular Biosciences, the University of Queensland, Brisbane, QLD 4072, Australia [2]School of Chemical Engineering, the University of New South Wales, Sydney, NSW 2052, Australia

出　　处：《Journal of Materials Science & Technology》2016年第1期24-27,共4页材料科学技术（英文版）

基　　金：financial support from the University of Queensland;the support of the Centre for Microscopy and Microanalysis at the University of Queensland through their facilities,and the scientific and technical assistance

摘　　要：In this work, we report enhanced electroactivity of Co304 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 Com species. Transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were em- ployed 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）-1 cm-2.In this work, we report enhanced electroactivity of Co304 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 Com species. Transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were em- ployed 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）-1 cm-2.

关 键 词：Co304 nanoparticles Crystal facets Glucose sensing 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ138.12[化学工程—无机化工]