نتایج جستجو برای: magnetic nps

تعداد نتایج: 348996  

2009
J. W. Myerson L. He D. M. Tollefsen S. A. Wickline

Localized thrombus formation as a consequence of cardiovascular disorders can lead to acute arterial or venous occlusions [1]. Heparin is the standard medication in emergency treatment of acute thrombi [2,3,4], but optimization of antithrombotic mediation of acute thrombi remains a significant research challenge [3,4]. Here, an antithrombotic soft nanoparticle was devised as a first-in-class an...

2008
Wei Wu Quanguo He Changzhong Jiang

Surface functionalized magnetic iron oxide nanoparticles (NPs) are a kind of novel functional materials, which have been widely used in the biotechnology and catalysis. This review focuses on the recent development and various strategies in preparation, structure, and magnetic properties of naked and surface functionalized iron oxide NPs and their corresponding application briefly. In order to ...

Journal: :Nanoscale 2014
Yongsheng Yu P Mukherjee Yuan Tian X-Z Li J E Shield D J Sellmyer

We report a facile synthesis of hard magnetic L10-FePtAu nanoparticles by coreduction of Fe(acac)3, Pt(acac)2 (acac = acetylacetonate) and gold acetate in oleylamine. In the current reaction condition, NP sizes are controlled to be 5.5 to 11.0 nm by changing the amount of Au doping. When the Au composition in the NPs is higher than 14%, the hard magnetic NPs are directly obtained without any an...

Journal: :organic chemistry research 0
sobhan rezayati islamic azad university zahra abbasi chemistry department, college of science shahid chamran university, ahvaz, iran eshagh rezaee nezhad department of chemistry, payame noor university, po box 19395-4697 tehran, iran rahimeh hajinasiri chemistry department, qaemshahr branch, islamic azad university, p.o. box 163, qaemshahr, iran shahin soleymani chalanchi 1department of chemistry, payame noor university, po box 19395-4697 tehran, iran

a simple and facile method for the preparation offe2+ supported on hydroxyapatite-core-shell-γ-fe2o3 nanoparticles (γ-fe2o3@hap-fe2+ nps) as an environmentally friendly and recyclable green catalyst is described and used for the one-pot synthesis of benzimidazoles and benzoxazole derivatives via reactions between aromatic aldehydes and ortho‐phenylenediamine or ortho‐aminophenol in aqueous medi...

Journal: :Nanoscale 2016
Han-Wen Cheng Jing Li Season Wong Chuan-Jian Zhong

MnZn ferrite (MnZnFe2O4, MZF) nanoparticles (NPs) represent an intriguing class of magnetic NPs in terms of composition-tunable magnetic properties, but the ability to control the size and morphology is essential to exploit such properties. This report describes the findings of an investigation of the size and morphology controllability in terms of growth kinetics of the NPs in a thermochemical...

Journal: :Biomaterials 2015
Shun Shen Sheng Wang Rui Zheng Xiaoyan Zhu Xinguo Jiang Deliang Fu Wuli Yang

In this study, the photothermal effect of magnetic nanoparticle clusters was firstly reported for the photothermal ablation of tumors both in vitro in cellular systems but also in vivo study. Compared with individual magnetic Fe3O4 nanoparticles (NPs), clustered Fe3O4 NPs can result in a significant increase in the near-infrared (NIR) absorption. Upon NIR irradiation at 808 nm, clustered Fe3O4 ...

2017
Laurence Ourry Delphine Toulemon Souad Ammar Fayna Mammeri

Background: Magnetic nanoparticles (NPs) must not only be well-defined in composition, shape and size to exhibit the desired properties (e.g., exchange-bias for thermal stability of the magnetization) but also judiciously functionalized to ensure their stability in air and their compatibility with a polymer matrix, in order to avoid aggregation which may seriously affect their physical properti...

Journal: :Chemphyschem : a European journal of chemical physics and physical chemistry 2009
Lioz Etgar Gregory Leitus Leonid Fradkin Yehuda G Assaraf Rina Tannenbaum Efrat Lifshitz

An investigation of the optical and magnetic properties of a unique hydrogen-linked conjugate nanostructure, comprised of superparamagnetic gamma-Fe(2)O(3) nanoparticles (NPs) and near-infrared PbSe nanocrystal quantum dot (NQD) chromophores, is reported. The results show retention of the NQDs' emission quantum efficiency and radiative lifetime, and only a small red shift of its band energy, up...

2015
Sirinrath Sirivisoot Benjamin S Harrison

To extend the external control capability of drug release, iron oxide nanoparticles (NPs) encapsulated into polymeric microspheres were used as magnetic media to stimulate drug release using an alternating magnetic field. Chemically synthesized iron oxide NPs, maghemite or hematite, and the antibiotic ciprofloxacin were encapsulated together within polycaprolactone microspheres. The polycaprola...

2014
Xianjin Cui Salome Belo Dirk Krüger Yong Yan Rafael T.M. de Rosales Maite Jauregui-Osoro Haitao Ye Shi Su Domokos Mathe Noémi Kovács Ildikó Horváth Mariann Semjeni Kavitha Sunassee Krisztian Szigeti Mark A. Green Philip J. Blower

Magnetic nanoparticles (NPs) MnFe2O4 and Fe3O4 were stabilised by depositing an Al(OH)3 layer via a hydrolysis process. The particles displayed excellent colloidal stability in water and a high affinity to [(18)F]-fluoride and bisphosphonate groups. A high radiolabeling efficiency, 97% for (18)F-fluoride and 100% for (64)Cu-bisphosphonate conjugate, was achieved by simply incubating NPs with ra...

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