نتایج جستجو برای: coprecipitation superparamagnetic

تعداد نتایج: 4995  

2014
A. P. TIWARI

Iron oxide nanoparticles were synthesized and coated with silica by conventional coprecipitation method. Silica coated iron oxide nanoparticles were surface functionalized with chitosan. Silica coating and chitosan functionalization were confirmed by FTIR and TG-DTA analysis. XRD pattern revealed that the pure phase of Fe3O4 was retained even after coating. Particles of average size 12 nm were ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Ana Rita O Rodrigues I T Gomes Bernardo G Almeida J P Araújo Elisabete M S Castanheira Paulo J G Coutinho

Nickel ferrite nanoparticles with superparamagnetic behavior at room temperature were synthesized using a coprecipitation method. These magnetic nanoparticles were either covered with a lipid bilayer, forming dry magnetic liposomes (DMLs), or entrapped in liposomes, originating aqueous magnetoliposomes (AMLs). A new and promising method for the synthesis of DMLs is described. The presence of th...

2007
Chia-Yu Lin Kuo-Chuan Ho

Superparamagnetic magnetite nanoparticles (MNPs), Fe3O4, were synthesized via the modified coprecipitation method. The morphology of these MNPs is polyhedral. The particle size of MNPs ranged from 20 to 100 nm. For combined hyperthermia and thermoresponsive drug delivery applications, the heating element, MNPs, in the core of drug carriers should increase the temperature of the target up to 43 ...

2015
Ildikó Y. Tóth Erzsébet Illés Márta Szekeres Etelka Tombácz

Polysaccharides are promising candidates for manufacturing biocompatible core-shell nanoparticles with potential in vivo use. Superparamagnetic magnetite nanoparticles (MNPs) have prospective application in both diagnosis and therapy, and so developing a novel polysaccharide shell on MNP core is of great challenge. MNPs were prepared by coprecipitation, then the surface of purified MNPs was coa...

عمیقیان, جمشید, مظفری, مرتضی, منوچهری, سهراب , یوسفی, محمد حسن,

In this research magnetic nanoparticles of cobalt–zinc ferrite (Co1-xZnxFe2O4, x=0, 0.2, 0.4, 0.6, 0.8), have been synthesized by the coprecipitation method, using stable ferric, zinc and cobalt salts with sodium hydroxide, at 80 ˚C. Phase formation and the morphology of the resulting nanoparticles were studied by X-ray diffraction and transmission electron microscopy respectively. Mean crystal...

Journal: :Materials Research-ibero-american Journal of Materials 2021

Zinc ferrite (ZnFe2O4) nanoparticles have attracted the attention of researchers because their unique chemical properties and particle-size-dependent magnetic properties. High-surface-area spinel ferrites numerous technical applications in areas such as high-density information storage, ferrofluids, catalysis. The coprecipitation technique is preferred method for preparing nanoscale ZnFe2O4 it ...

2002
Zheng Jiao Gang Ye Feng Chen Mingqiang Li Jinhuai Liu

ZnGa2O4 nano crystals were prepared by an improved coprecipitation method, which we call ‘spray coprecipitation’. XRD results shows the resulting crystal size using the new method is under 10nm, whereas the powder prepared by ordinary coprecipitation is about 30nm. XRD results also shows ZnO peaks exists in ZnGa2O4 powder prepared by traditional coprecipitation, but disappears in ZnGa2O4 nano c...

2014
Tatiana Borisova Natalia Krisanova Arsenii Borуsov Roman Sivko Ludmila Ostapchenko Michal Babic Daniel Horak

The manipulation of brain nerve terminals by an external magnetic field promises breakthroughs in nano-neurotechnology. D-Mannose-coated superparamagnetic nanoparticles were synthesized by coprecipitation of Fe(II) and Fe(III) salts followed by oxidation with sodium hypochlorite and addition of D-mannose. Effects of D-mannose-coated superparamagnetic maghemite (γ-Fe2O3) nanoparticles on key cha...

Journal: :Biochimica et biophysica acta 1982
K Stenberg B Oberg J B Chattopadhyaya

Earlier it has been shown that nucleic acids of high molecular weight can be be introduced into cells by coprecipitation with calcium phosphate. We have studied the requirements for calcium phosphate coprecipitation of shorter nucleotides. The degree of coprecipitation of dodecanucleotides lacking terminal phosphate varied between 25 and 72%. Tetramers with a 5'-monophosphate were coprecipitate...

2001
Jiye Fang John Wang Leong-Ming Gan Ser-Choon Ng

Ž . Ultrafine lead titanate PbTiO powders in tetragonal form have been successfully prepared via two processing routes, 3 Ž . Ž . namely, conventional coprecipitation CPC and microemulsion-refined coprecipitation MCP . The formation process of lead titanate from the resulting precursors was monitored using techniques such as thermal analyses, FTIR spectroscopy, Raman scattering spectroscopy and...

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