PMID- 24757981 OWN - NLM STAT- MEDLINE DCOM- 20140529 LR - 20190715 IS - 1533-4880 (Print) IS - 1533-4880 (Linking) VI - 14 IP - 7 DP - 2014 Jul TI - Optimization of oleylamine-Fe3O4/MWCNTs nanocomposite modified GC electrode for electrochemical determination of ofloxacin. PG - 5059-69 AB - Iron oxide (Fe3O4) nanoparticles are prepared by nucleation method using oleylamine (OLA) as the capping agent. The OLA capped Fe3O4 nanoparticles (OLA-Fe3O4) are characterized by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray Diffraction (XRD) and High Resolution Transmission Electron Microscopic (HRTEM) analysis. The morphology of the OLA-Fe3O4 nanoparticles is found to be spherical with an average size of 7.5 +/- 0.5 nm. OLA-Fe3O4 nanoparticles are incorporated into the carboxyl functionalized Multi-walled carbon nanotubes (MWCNTs) at different 10, 20, 30, 40 and 50 wt% by ultrasonication. The optimum loading of OLA-Fe3O4 nanoparticles on the MWCNTs was characterized by FTIR, Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM) and Linear Sweep Voltammetry (LSV). Finally, the 40wt% of OLA-Fe3O4 nanoparticles on MWCNTs was chosen as the optimum loading and this composition was used for the electrochemical oxidation of ofloxacin (OFX). For determination of OFX in OLA-Fe3O4/MWCNTs modified glassy carbon (GC) electrode show high sensitivity and fast response. The sensitivity of the modified electrode was calculated to be 0.578 microAmicroM(-1) with a detection limit of 0.060 microM. The high sensitivity, wider linear range, good reproducibility and the minimal surface fouling make this OLA-Fe3O4/MWCNTs/GC modified electrode acts as a promising platform for electrochemical determination of OFX. FAU - Kumar, Deivasigamani Ranjith AU - Kumar DR FAU - Manoj, Devaraj AU - Manoj D FAU - Santhanalakshmi, Jayadevan AU - Santhanalakshmi J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Nanosci Nanotechnol JT - Journal of nanoscience and nanotechnology JID - 101088195 RN - 0 (Amines) RN - 0 (Anti-Bacterial Agents) RN - 0 (Ferric Compounds) RN - 0 (Nanotubes, Carbon) RN - 1K09F3G675 (ferric oxide) RN - 7440-44-0 (Carbon) RN - A4P49JAZ9H (Ofloxacin) RN - ZDQ1JWQ8DT (oleylamine) SB - IM MH - Amines/*chemistry MH - Anti-Bacterial Agents/*analysis MH - Carbon/*chemistry MH - Conductometry/instrumentation MH - *Electrodes MH - Equipment Design MH - Equipment Failure Analysis MH - Ferric Compounds/*chemistry MH - Nanotubes, Carbon/*chemistry/ultrastructure MH - Ofloxacin/*analysis MH - Transducers EDAT- 2014/04/25 06:00 MHDA- 2014/05/30 06:00 CRDT- 2014/04/25 06:00 PHST- 2014/04/25 06:00 [entrez] PHST- 2014/04/25 06:00 [pubmed] PHST- 2014/05/30 06:00 [medline] AID - 10.1166/jnn.2014.8676 [doi] PST - ppublish SO - J Nanosci Nanotechnol. 2014 Jul;14(7):5059-69. doi: 10.1166/jnn.2014.8676.