Oleate Coated Magnetic Cores Based on Magnetite, Zn Ferrite and Co Ferrite Nanoparticles - Preparation, Physical Characterization and Biological Impact on Helianthus Annuus Photosynthesis

Journal Article · Thu Dec 02 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3530050· OSTI ID:21519887

Ursache-Oprisan, Manuela; Foca-nici, Ecaterina; Cirlescu, Aurelian; Caltun, Ovidiu; Creanga, Dorina ^[1]

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1. Al. I. Cuza' University, Faculty of Physics, 11A Blvd.Copou, 700506, Iasi (Romania)

Sodium oleate was used as coating shell for magnetite, Zn ferrite and Co ferrite powders to stabilize them in the form of aqueous magnetic suspensions. The physical characterization was carried out by applying X-ray diffraction and magnetization measurements. Both crystallite size and magnetic core diameter ranged between 7 and 11 nm. The influence of magnetic nanoparticle suspensions (corresponding to magnetic nanoparticle levels of 10{sup -14}-10{sup -15}/cm{sup 3}) on sunflower seedlings was studied considering the changes in the photosynthesis pigment levels. Similar responses were obtained for magnetite and cobalt ferrite nanoparticle treatment consisting in the apparent inhibition of chlorophyll biosynthesis while for zinc ferrite nanoparticles some concentrations seemed to have stimulatory effects on the chlorophylls as well as on the carotene levels. But the chlorophyll ratio was diminished in the case of all three types of magnetic nanoparticles meaning their slight negative effect on the light harvesting complex II (LHC II) from the chloroplast membranes and consequently on the photosynthesis efficiency.

• OSTI ID: 21519887
• Journal Information: AIP Conference Proceedings, Vol. 1311, Issue 1; Conference: 8. international conference on the scientific and clinical applications of magnetic carriers, Rostock (Germany), 25-29 May 2010; Other Information: DOI: 10.1063/1.3530050; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
BIOSYNTHESIS
CAROTENOIDS
CERN LHC
CHLOROPHYLL
CHLOROPLASTS
COBALT COMPOUNDS
FERRITES
MAGNETIC CORES
MAGNETITE
MAGNETIZATION
MEMBRANES
NANOSTRUCTURES
PARTICLES
PHOTOSYNTHESIS
POWDERS
SODIUM COMPOUNDS
SUSPENSIONS
X-RAY DIFFRACTION
ZINC COMPOUNDS
ACCELERATORS
ALKALI METAL COMPOUNDS
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CHEMICAL REACTIONS
COHERENT SCATTERING
CYCLIC ACCELERATORS
DIFFRACTION
DISPERSIONS
FERRIMAGNETIC MATERIALS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IRON COMPOUNDS
IRON ORES
MAGNETIC MATERIALS
MAGNETIC STORAGE DEVICES
MATERIALS
MEMORY DEVICES
MINERALS
ORES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHYTOCHROMES
PIGMENTS
PORPHYRINS
PROTEINS
SCATTERING
STORAGE RINGS
SYNCHROTRONS
SYNTHESIS
TERPENES
TRANSITION ELEMENT COMPOUNDS