title: Hematite nanoparticles-modified electrode based electrochemical sensing platform for dopamine.
abstract: Hematite (α-Fe2O3) nanoparticles were synthesized by the solid transformation of ferrous hydroxide and ferrihydrite in hydrothermal condition. The as-prepared α-Fe2O3 nanoparticles were characterized by UV-vis, PL, XRD, Raman, TEM, AFM, FESEM, and EDX analysis. The experimental results indicated the formation of uniform hematite nanoparticles with an average size of 45 nm and perfect crystallinity. The electrochemical behavior of a GC/α-Fe2O3 electrode was studied using CV and EIS techniques with an electrochemical probe, [Fe(CN)6](3-/4-) redox couple. The electrocatalytic activity was investigated toward DA oxidation in a phosphate buffer solution (pH 6.8) by varying different experimental parameters. The chronoamperometric study showed a linear response in the range of 0-2 μM with LoD of 1.6 μM for DA. Square wave voltammetry showed a linear response in the range of 0-35 μM with LoD of 236 nM for DA.
authors.affiliation: Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Khosro Zangeneh
authors.initials: KZ
authors.lastname: Kamali
authors.affiliation: Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Pandikumar
authors.initials: P
authors.lastname: Alagarsamy
authors.affiliation: Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Nay Ming
authors.initials: NM
authors.lastname: Huang
authors.affiliation: Nanotechnology & Catalysis Research Center, Institute of Graduate Studies, University of Malaya, Level 3, Block A, 50603 Kuala Lumpur, Malaysia.
authors.forename: Boon Hoong
authors.initials: BH
authors.lastname: Ong
authors.affiliation: Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: Hong Ngee
authors.initials: HN
authors.lastname: Lim
mesh_terms: D004298:Dopamine / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D004298:Dopamine