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Rare Metals 2006年第z1期25卷 426-430页

作者： CUI Sheng SHEN Xiaodong LIN Benlan College of Material Science and Technology Nanjing University of Technology Nanjing 210009 China College of Material Science and Technology Nanjing University of Technology Nanjing 210009 China College of Material Science and Technology Nanjing University of Technology Nanjing 210009 China

fe3o4 nanoparticles were prepared by chemistry co-precipitation and the mean crystal size was 17.9 nm measured by XRD. After it had been treated by silane-coupling agents KH570, magnetic micro-spheres dispersed in organic medium glycol were gained and the mean size of fe3o4 nanopowders was 33.7 nm. So it can be concluded that magnetic micro-sphere is made of a few fe3o4 crystals. Many factors of modification were researched, such as the time of ball milling, the content of fe3o4 and the content of KH570. The modification of fe3o4 is relative to the time of ball milling, but the dominant function is affected by the content of fe3o4 and KH570. When the content of fe3o4 is known, there is a suitable content of KH570. Different content of fe3o4 will make the different suitable content of KH570, but the range of latter is less than former, which is relative to the distribution of KH570 on fe3o4 surface or in the solution.

关键词： fe3o4 nanoparticles organic modification silane-coupling agents

Folate-conjugated fe_3o_4 nanoparticles for in vivo tumor labeling

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Transactions of Nonferrous Metals Society of China 2013年第7期23卷 2079-2084页

作者：周春姣王少华周宇容鹏飞陈孜孜刘进言周建大湖南农业大学理学院长沙410128 中南大学湘雅三医院长沙410013

Highly biocompatible superparamagnetic fe3o4 nanoparticles were synthesized by amide of folic acid （FA） ligands and the NH2-group onto the surface of fe3o4 nanoparticles. The as-synthesized folate-conjugated fe3o4 nanoparticles were characterized by X-ray diffraction diffractometer, transmission electron microscope, FT-IR spectrometer, vibrating sample magnetometer, and dynamic light scattering instrument. The in vivo labeling effect of folate-conjugated fe3o4 nanoparticles on the hepatoma cells was investigated in tumor-bearing rat. The results demonstrate that the as-prepared nanoparticles have cubic structure of fe3o4 with a particle size of about 8 nm and hydrated diameter of 25.7 nm at a saturation magnetization of 51 A·m2/kg. These nanoparticles possess good physiological stability, low cytotoxicity on human skin fibroblasts and negligible effect on Wistar rats at the concentration as high as 3 mg/kg body mass. The folate-conjugated fe3o4 nanoparticles could be effectively mediated into the human hepatoma Bel 7402 cells through the binding of folate and folic acid receptor, enhancing the signal contrast of tumor tissue and surrounding normal tissue in MRI imaging. It is in favor of the tumor cells labeling, tracing, magnetic resonance imaging （MRI） target detection and magnetic hyperthermia.

关键词： fe3o4 nanoparticles superparamagnetic property folic acid tumor conjugation magnetic resonance imaging (MRI) cell labeling

Size-dependent peroxidase-like catalytic activity of fe_3o_4 nanoparticles

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Chinese Chemical Letters 2008年第6期19卷 730-733页

作者： Fang Fang Peng YU Zhang Ning Gu State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China Jiangsu Laboratory for Biomaterials and Devices Southeast University Nanjing 210096 China School of Chemistry and Chemical Engineering Southeast University Nanjing 210096 China

Peroxidase-like catalytic properties of fe3o4 nanoparficles （NPs） with three different sizes, synthesized by chemical coprecipitation and sol-gel methods, were investigated by UV-vis spectrum analysis. By comparing fe3o4 NPs with average diameters of 11, 20, and 150 nm, we found that the catalytic activity increases with the reduced nanoparticle size. The electrochemical method to characterize the catalytic activity of fe3o4 NPs using the response currents of the reaction product and substrate was also developed.

关键词： fe3o4 nanoparticles Peroxidase-like catalytic activity Electrochemistry

Surface Modfication of fe_3o_4 nanoparticles

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Journal of China University of Mining and Technology 2006年第3期16卷 359-361页

作者： LIU Yong-jian JIA Hong-yi ZHUANG Hong Department of Chemistry Suzhou College of Science and Technology Suzhou Jiangsu 215011 China School of Chemistry and Environment Engineering China University of Mining ＆ Technology Beijing 100083 China

Nanometer particles are important portion of magnetic fluid. fe3o4 magnetic nanoparticles were studied in this paper and the surface modification of fe3o4 nanoparticles was investigated by a series of experiments. fe3o4 magnetic nanoparticles were synthesized with pH value, temperature, and the dosage of surfactant. The phase, structure, size and magnetism of nanoparticles were tested by X-ray diffration （XRD）, transmission electron microscopy （TEM） and magnetic balance. on the basis of the surface modification coating mechanism, the experimental phenomena and the effects on the variation of size, magnetism and stability of fe3o4 nanoparticles were theoretically analyzed. X-Ray diffraction spectrum and TEM photograph show that 1） the nanoparticles structure is perfect, 2） the diameter of narnoparticles is small and have good deliquescence, and 3） Sodium oleate is the anion surfactant. Therefore 1） the good condition of surface modification is in an acidic solution, 2） the best temperature of surface modification is at 80 ℃, and 3） the dosage of surfactant should be about 0.6 times of that of fe^2＋.

关键词： fe3o4 nanoparticles magnetic grain surface modification mechanism

Photothermal Effect for fe_3o_4 nanoparticles Contained in Micelles Induced by Near-Infrared Light

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Journal of Shanghai Jiaotong university(Science) 2012年第6期17卷 730-733页

作者：刘光臻马俊平刘家强 Institute for Biomedical Engineering&Nano Science Tongji University School of Materials Science and Engineering Tongji University Key Laboratory of Rubber-Plastics of Ministry of Education Qingdao University of Science and Technology

Near infrared （NIR） light induced photothermal effect for fe304 nanoparticles, contained in Pluronic F127 micelles, has been studied and it exhibits high photothermal converting efficiency. Heat is found to be rapidly generated in micelles containing fe304 nanoparticles by NIR laser irradiation. Upon irradiation at 808 nm light and with mass concentration of Pe304 nanoparticles in 4 g/L, the micelle temperature increase is higher than 34 ℃ for 10 min irradiation. The maximum temperature of micelles containing fe304 nanoparticles in 4 g/L reaches 62 ℃.

关键词： fe3o4 nanoparticles photothermal effect near infrared (NIR) light micelles

Adsorption of fe3o4-Polyoxometalates(PoMs) nanoparticles

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Adsorption of Fe3O4-Polyoxometalates(POMs) nanoparticles

Surface organic Modification of fe_3o_4 Magnetic nanoparticles

河南省化学会2016年学术年会

作者： Ning Fang Chun-Yan Li Ming-Xue Li Hong-Ling Liu Key Lab of Polyoxometalate Chemistry of Henan Province Institute of Molecular and Crystal EngineeringSchool of Chemistry and Chemical Engineering Henan University

In the field of magnetic recording material, special adsorption material, the basic material of magnetic fluid and magnetic pigment and so on, as function material, magnetic feo nanoparticle behave many special function. [Cu(L)(Ho)]H[Cu(L)(PMoo)·5Ho possess not only acid adsorption performance but also oxido-reduction performance of metal oxide, it is a sort of difunctional material, which have better adsorption performance. In this paper, we report the synthesis of polymer-coated fe3o4 nano-particles using triblock copolymer PEo-PPo-PEo as the surfactant[1] and comparing feo with [Cu(L)(Ho)]H[Cu(L)(PMoo)]·5Ho by ultrasound, then we put the magnet near the beaker, and draw out the part of having magnetism,which having magnetism was allowed to evaporate at room temperature for further use. Methyl blue(MB) and safranine T(ST) are harmful if swallowed by human beings and animals, causing irritation to the skin, eye and respiratory tract. Therefore, an effective and optimal strategy to degrade the dyes rapidly must be developed[2].Fig.1 shows that 1 remove fully MB molecules in 12 min. Fig.2 shows that 1 remove fully ST molecules in 60 min. These results revealed that it was able to remove the MB and ST molecules efficient-ly in dark. Such rapid adsorption rate for 1 towards these dyes was suspected that large amounts of dyes are adsorbed on the surface of sample particles.(1=feo-[(Cu L)(Ho)]H[(Cu L)(PMoo3)]·5Ho)

关键词： adsorption fe3o4 nanoparticles fe3o4-Polyoxometalates(PoMs) nanoparticles

来源： cnki会议评论

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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 436-439页

作者： CUI Sheng SHEN Xiaodong LIN Benlan JIANG Guodong ZHANG Weihua College of Material Science and Technology Nanjing University of Technology Nanjing 210009 China

The surface organic modification of fe3o4 nanoparticles with silane coupling reagent KH570 was studied. The modified and unmodified nanoparticles were characterized by FT-IR, XPS and TEM. The spectra of FT-IR and XPS revealed that KH570 was coated onto the surface of fe3o4 nanoparticles to get fe-o- Si bond and an organic coating layer also was formed. fe3o4 nanoparticles were spheres partly with mean size of 18,8 nm studied by TEM, which was consistent with the result 17.9 nm calculated by Scherrer＇s equation. KH570 was adsorbed on surface and formed chemistry bond to be steric hindrance repulsion which prevented nanoparticles from reuniting. Then glycol-based fe3o4 magnetic liquids dispersed stably was gained.

关键词： fe3o4 nanoparticles KH570 surface organic modification chemical adsorb dispersivity

Preparation and characterization of cross-linked β-cyclodextrin polymer/fe_3o_4 composite nanoparticles with core-shell structures

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Chinese Chemical Letters 2011年第2期22卷 217-220页

作者： Rui Xue Li Shu Mei Liu Jian Qing Zhao Hideyuki otsuka Atsushi Takahara College of Materials Science and Engineering South China University of TechnologyGuangzhou510640China Institute for Materials Chemistry and Engineering Kyushu UniversityFukuoka 819-0395Japan

Cross-linkedβ-cyclodextrin polymer/fe3o4 composite nanoparticles with core-shell structures were prepared via cross linking reaction on the surface of carboxymethylβ-cyclodextrin（CM-β-CD） modified fe3o4 nanoparticles inβ-cyclodextrin alkaline solution by using epichlorohydrin as crosslinking *** morphology,structure and magnetic properties of the prepared composite nanoparticles were investigated by transmission electron microscopy（TEM）,Fourier transform infrared（FTIR） spectrometry,X-ray diffraction（XRD） measurement,thermogravimetric analysis（TGA） and Vibrating sample magnetometry （VSM）,respectively.

关键词： Cross-linkedβ-cyclodextrin polymer fe3o4 nanoparticles Composite nanoparticles Core-shell structures

Synthesis of size-controlled hollow fe3o4 nanospheres and their growth mechanism

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Particuology 2020年第2期18卷 16-23页

作者： Lei Shi Yurong He Yanwei Hu Xinzhi Wang Baocheng Jiang Yimin Huang Heilongjiang Key Laboratory of New Energy Storage Materials and Processes Harbin 150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Size-controlled hollow fe3o4 nanospheres were synthesized via a one-pot hydrothermal method as a function of reaction time and sodium citrate,polyacrylamide,and urea *** characterization techniques such as scanning and transmission electron microscopy and Raman spectroscopy were employed to investigate the crystal structure and morphology of the obtained *** fe3o4 nanosphere formation mechanism was elucidated from analyzing the characterization *** levels of sodium citrate and longer reaction times were observed to increase the diameter of the nanospheres until hollow structures ***,polyacrylamide and urea promoted the formation of hollow *** hollow-structured fe3o4 nanospheres exhibited high magnetization saturation values in the range of 48.8-58.7 emu/*** facile synthesis method described herein,to generate size-controlled fe3o4 nanospheres with tailored properties,demonstrates potential across a wide range of fields from drug-delivery and stealth devices,to environmental and energy applications.

关键词： fe3o4 nanoparticles Sphere size Magnetic properties