نتایج جستجو برای: silica coated magnetic nanoparticles

تعداد نتایج: 504740  

2014
Ou Chen Lars Riedemann Fred Etoc Hendrik Herrmann Mathieu Coppey Mariya Barch Christian T. Farrar Jing Zhao Oliver T. Bruns He Wei Peng Guo Jian Cui Russ Jensen Yue Chen Daniel K. Harris Jose M. Cordero Zhongwu Wang Alan Jasanoff Dai Fukumura Rudolph Reimer Maxime Dahan Rakesh K. Jain Moungi G. Bawendi

Magneto-fluorescent particles have been recognized as an emerging class of materials that exhibit great potential in advanced applications. However, synthesizing such magneto-fluorescent nanomaterials that simultaneously exhibit uniform and tunable sizes, high magnetic content loading, maximized fluorophore coverage at the surface and a versatile surface functionality has proven challenging. He...

Journal: :Talanta 2009
Xin Wang Lianyan Wang Xiwen He Yukui Zhang Langxing Chen

In this study, we synthesized Fe(3)O(4) magnetic nanoparticles coated estrone-imprinted polymer with controlled size using a semi-covalent imprinting strategy. In this protocol, the estrone-silica monomer complex (EstSi) was synthesized by the reaction 3-(triethoxysilyl)propyl isocyanate with estrone, where the template was linked to the silica coating on the iron oxide core via a thermally rev...

In this work, we investigated synthesis, magnetic properties of silica coated metal ferrite, (CoFe2O4)/SiO2 and Manganese doped cobalt ferrite nanoparticles (MnxCo1-xFe2O4 with x= 0.02, 0.04 and 0.06)/SiO2 for possible biomedical application. All the ferrites nanoparticles were prepared by co-precipitation method using FeCl3.6H2O, CoCl2.6H2O and MnCl2.2H2O as precursors, and were silica coated ...

Journal: :iranian chemical communication 0
alireza khorshidi department of chemistry, faculty of sciences, university of guilan, p.o. box: 41335-1914, rasht, iran shahab shariati department of chemistry, faculty of sciences, rasht branch, islamic azad university, rasht, iran masoumeh aboutalebi department of chemistry, faculty of sciences, university of guilan, p.o. box: 41335-1914, rasht, iran neda mardazad department of chemistry, faculty of sciences, university of guilan, p.o. box: 41335-1914, rasht, iran

fe3o4 magnetic nanoparticles were synthesized by co-precipitation of fe2+ and fe3+ in aqueous naoh. then silica was coated on the obtained nanoparticles and the whole composite was functionalized with chlorosulfonic acid in ch2cl2. the obtained nanocomposite (fe3o4@sio2-so3h) was characterized by ft-ir, vsm and xrd techniques and was used as an efficient catalyst in condensation reaction of ind...

Journal: :applied biotechnology reports 0
keyvan nasirzadeh shahram nazarian seyed mohammad gheibi hayat

recent investigations have been shown that inorganic nanomaterials including gold nanoparticles, nonporous and mesoporous silica nanoparticles, magneticnanoparticles, and quantum dots have shown great potential in bioimaging, targeted drug delivery, and cancer therapies. biocompatibility, ease of synthesis, and ease of surface functionalization are among the significant properties of nonporous ...

In this work, we investigated synthesis, magnetic properties of silica coated metal ferrite, (CoFe2O4)/SiO2 and Manganese doped cobalt ferrite nanoparticles (MnxCo1-xFe2O4 with x= 0.02, 0.04 and 0.06)/SiO2 for possible biomedical application. All the ferrites nanoparticles were prepared by co-precipitation method using FeCl3.6H2O, CoCl2.6H2O and MnCl2.2H2O as precursors, and were silica coated ...

2003
Ji-Hun Yu Chang-Woo Lee Sung-Soon Im Jai-Sung Lee

Magnetic nanoparticles for applications in separation and purification processes must satisfy several basic requirements. They should be superparamagnetic, i.e. possess low coercivity (H c ) and low retentivity (M r ), to enable re-dispersion after magnetic capture. In this study, the synthesis of SiO 2 coated γ-Fe 2 O 3 nanocomposite particles has been attempted to achieve the above magnetic p...

2014
Joseph Govan Yurii K. Gun’ko

Magnetic nanoparticles are a highly valuable substrate for the attachment of homogeneous inorganic and organic containing catalysts. This review deals with the very recent main advances in the development of various nanocatalytic systems by the immobilisation of homogeneous catalysts onto magnetic nanoparticles. We discuss magnetic core shell nanostructures (e.g., silica or polymer coated magne...

2017
Sabrina Foglia Mario Ledda Daniela Fioretti Giovanna Iucci Massimiliano Papi Giovanni Capellini Maria Grazia Lolli Settimio Grimaldi Monica Rinaldi Antonella Lisi

Magnetic iron oxide nanoparticles (IONPs), for their intriguing properties, have attracted a great interest as they can be employed in many different biomedical applications. In this multidisciplinary study, we synthetized and characterized ultrafine 3 nm superparamagnetic water-dispersible nanoparticles. By a facile and inexpensive one-pot approach, nanoparticles were coated with a shell of si...

Journal: :international journal of nano dimension 0
m. seyed sadjadi department of chemistry, science and research branch, islamic azad university, tehran 14778 92855, iran. s. e. babaei department of chemistry, science and research branch, islamic azad university, tehran 14778 92855, iran. n. farhadyar department of chemistry, varamin –pishva branch, islamic azad university, varamin, iran.

in this work, we report synthesis of surface modified superparamagnetic iron oxide nanoparticles (spion) by co-precipitation method using feso4.7h2o and fe2(so4)3.5h2o as precursors and trisodium citrate dihydrate as surfactant. surface modification of the as prepared samples was performed in pot by sol-gel precipitation method using tetraethoxysilane (teos). the structure, morphology, and magn...

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