Prasad, R.Badekai Ramachandra, B.R.2026-02-052015Sensors and Actuators B: Chemical, 2015, 220, , pp. 81-909254005https://doi.org/10.1016/j.snb.2015.05.065https://idr.nitk.ac.in/handle/123456789/26276We report a simple, solvent-free method to decorate multi-walled carbon nanotubes (MWCNTs) with nickel oxide nanoparticles (NiO-NPs). The as prepared NiO-MWCNT composite were characterised by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. The enzyme-free modified carbon paste electrode (CPE) was fabricated using as-synthesised composite material and investigated for glucose sensing. The 10% NiO-MWCNTs composites sensor showed excellent electro-catalytic activity towards direct glucose oxidation. The sensitivity of this sensor is found to be 1696 ?A mM-1 cm-2 and 122.1 ?A mM-1 cm-2 and the limit of detection (LOD) was found to be 11.04 nM and 31 ?M for the linear response over glucose concentration ranging from 1-200 ?M to 0.5-9.0 mM, respectively. Furthermore, the 10% NiO-MWCNTs sensor also showed excellent anti-interference ability, high stability and good reproducibility. Hence, due to simple method of material preparation, easy sensor fabrication and excellent electro catalytic activity towards glucose oxidation, the 10% NiO-MWCNT/CPE is a potential material for the development of enzyme-free sensor for reliable glucose determination. © 2015 Elsevier B.V. All rights reserved.Carbon nanotubesCatalyst activityCatalytic oxidationComposite materialsElectrochemical sensorsElectron microscopyEnzyme electrodesEnzymesField emission microscopesGlucoseGlucose sensorsNanoparticlesNickel oxideScanning electron microscopyTransmission electron microscopyX ray diffractionYarnAmperometricElectrocatalytic activityElectrochemical glucose sensorsField emission scanning electron microscopyMetal formatesModified carbon paste electrodeNickel oxide nanoparticleSolvent freeMultiwalled carbon nanotubes (MWCN)