Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties

Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties

Iron/iron oxide-based nanocomposites were prepared by IR laser sensitized pyrolysis of Fe(CO)5 and methyl methacrylate (MMA) mixtures. The morphology of nanopowder analyzed by TEM indicated that mainly core-shell structures were obtained. X-ray diffraction techniques evidence the cores as formed mai...

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Main Authors: R. Alexandrescu, I. Morjan, A. Tomescu, C. E. Simion, M. Scarisoreanu, R. Birjega, C. Fleaca, L. Gavrila, I. Soare, F. Dumitrache, G. Prodan
Format: Article
Language:English
Published: Hindawi Limited 2010-01-01
Series:Journal of Nanomaterials
Online Access:http://dx.doi.org/10.1155/2010/324532
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spelling doaj-2df62a0ae4ca46938a8a8dc6555317972020-11-24T23:37:55ZengHindawi LimitedJournal of Nanomaterials1687-41101687-41292010-01-01201010.1155/2010/324532324532Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing PropertiesR. Alexandrescu0I. Morjan1A. Tomescu2C. E. Simion3M. Scarisoreanu4R. Birjega5C. Fleaca6L. Gavrila7I. Soare8F. Dumitrache9G. Prodan10Laser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaboratory of Low Dimensional Systems—Group of Gas Sensors, National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, RomaniaLaboratory of Low Dimensional Systems—Group of Gas Sensors, National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaLaser Department—Laboratory for Laser Photochemistry, National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 077125 Bucharest, RomaniaDepartment of Chemistry, Ovidius University of Constanta, 900527 Constanta, RomaniaIron/iron oxide-based nanocomposites were prepared by IR laser sensitized pyrolysis of Fe(CO)5 and methyl methacrylate (MMA) mixtures. The morphology of nanopowder analyzed by TEM indicated that mainly core-shell structures were obtained. X-ray diffraction techniques evidence the cores as formed mainly by iron/iron oxide crystalline phases. A partially degraded (carbonized) polymeric matrix is suggested for the coverage of the metallic particles. The nanocomposite structure at the variation of the laser density and of the MMA flow was studied. The new materials prepared as thick films were tested for their potential for acting as gas sensors. The temporal variation of the electrical resistance in presence of NO2, CO, and CO2, in dry and humid air was recorded. Preliminary results show that the samples obtained at higher laser power density exhibit rather high sensitivity towards NO2 detection and NO2 selectivity relatively to CO and CO2. An optimum working temperature of 200°C was found.http://dx.doi.org/10.1155/2010/324532
collection DOAJ
language English
format Article
sources DOAJ
author R. Alexandrescu
I. Morjan
A. Tomescu
C. E. Simion
M. Scarisoreanu
R. Birjega
C. Fleaca
L. Gavrila
I. Soare
F. Dumitrache
G. Prodan
spellingShingle R. Alexandrescu
I. Morjan
A. Tomescu
C. E. Simion
M. Scarisoreanu
R. Birjega
C. Fleaca
L. Gavrila
I. Soare
F. Dumitrache
G. Prodan
Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties
Journal of Nanomaterials
author_facet R. Alexandrescu
I. Morjan
A. Tomescu
C. E. Simion
M. Scarisoreanu
R. Birjega
C. Fleaca
L. Gavrila
I. Soare
F. Dumitrache
G. Prodan
author_sort R. Alexandrescu
title Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties
title_short Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties
title_full Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties
title_fullStr Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties
title_full_unstemmed Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)5/MMA Mixtures: Structural and Sensing Properties
title_sort direct production of a novel iron-based nanocomposite from the laser pyrolysis of fe(co)5/mma mixtures: structural and sensing properties
publisher Hindawi Limited
series Journal of Nanomaterials
issn 1687-4110
1687-4129
publishDate 2010-01-01
description Iron/iron oxide-based nanocomposites were prepared by IR laser sensitized pyrolysis of Fe(CO)5 and methyl methacrylate (MMA) mixtures. The morphology of nanopowder analyzed by TEM indicated that mainly core-shell structures were obtained. X-ray diffraction techniques evidence the cores as formed mainly by iron/iron oxide crystalline phases. A partially degraded (carbonized) polymeric matrix is suggested for the coverage of the metallic particles. The nanocomposite structure at the variation of the laser density and of the MMA flow was studied. The new materials prepared as thick films were tested for their potential for acting as gas sensors. The temporal variation of the electrical resistance in presence of NO2, CO, and CO2, in dry and humid air was recorded. Preliminary results show that the samples obtained at higher laser power density exhibit rather high sensitivity towards NO2 detection and NO2 selectivity relatively to CO and CO2. An optimum working temperature of 200°C was found.
url http://dx.doi.org/10.1155/2010/324532
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