title: The study of structural properties of carbon nanotubes decorated with NiFe₂O₄ nanoparticles and application of nano-composite thin film as H₂S gas sensor.
abstract: Nano-composite of multiwall carbon nanotube, decorated with NiFe2O4 nanoparticles (NiFe2O4-MWCNT), was synthesized using the sol-gel method. NiFe2O4-MWCNTs were characterized using different methods such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM) and vibrating sample magnetometer (VSM). The average size of the crystallites is 23.93 nm. The values of the saturation magnetization (MS), coercivity (HC) and retentivity (MR) of NiFe2O4-MWCNTs are obtained as 15 emu g(-1), 21Oe and 5 emu g(-1), respectively. In this research, NiFe2O4-MWCNT thin films were prepared with the spin-coating method. These thin films were used as the H2S gas sensor. The results suggest the possibility of the utilization of NiFe2O4-MWCNT nano-composite, as the H2S detector. The sensor shows appropriate response towards 100 ppm of H2S at 300°C.
authors.affiliation: Department of Physics, Payame Noor University, Mashhad, Iran. Electronic address: Rezvan.hajihashemi@yahoo.com.
authors.forename: R
authors.initials: R
authors.lastname: Hajihashemi
authors.affiliation: Nanotechnology Research Center, Research Institute of Petroleum Industry, P.O., Tehran, Iran.
authors.forename: Ali M
authors.initials: AM
authors.lastname: Rashidi
authors.affiliation: Nanotechnology Research Center, Research Institute of Petroleum Industry, P.O., Tehran, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Alaie
authors.affiliation: Department of Physics, Shahreza Branch, Islamic Azad University, Shahreza, Iran.
authors.forename: R
authors.initials: R
authors.lastname: Mohammadzadeh
authors.affiliation: Nanotechnology Research Center, Research Institute of Petroleum Industry, P.O., Tehran, Iran.
authors.forename: N
authors.initials: N
authors.lastname: Izadi
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D014961:X-Ray Diffraction
chemical_list: D005290:Ferric Compounds; D037742:Nanotubes, Carbon; C550717:nickel ferrite; D009532:Nickel
keywords: Gas sensor; Nano-composite; Thin films