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Facile synthesis of Er^(3+)/Tm^(3+)co-doped magnetic/luminescent nanosystems for possible bioimaging and therapy applications

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Journal of Rare Earths 2022年第1期40卷 11-19页

作者： Hongyu Liu Jiabei Li Pengfei Hu Songqiang Sun Liyi Shi Lining Sun Research Center of Nano Science and Technology College of SciencesShanghai UniversityShanghai 200444China Department of Chemistry College of SciencesShanghai UniversityShanghai 200444China Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China Instrumental Analysis&Research Center Shanghai UniversityShanghai 200444China

manganese-zinc ferrite is a kind of very important magnetic ferrite *** properties of wide absorption band,sensitivity to ultraviolet(UV)light and tumor H_(2)O_(2) promise it to be possibly used as a photothermal therapy(PTT),photodynamic therapy(PDT)and chemodynamic therapy(CDT)*** on the unique advantages of rare-earth doped nanoparticles,an Er^(3+),Tm^(3+)co-doped upconversion-mediated nanosystem with manganese-zinc ferrite shell(named as UCNPS@M)was developed through a facile thermal co-decomposition *** final nanosystems were surface-modified by using dopamine hydrochloride(DA)in order to warrant good biocompatibility(named as UCNPS@M@DA).Under irradiation of near-infrared(NIR)light,UCNPS emit both ultraviolet and visible *** UV light is mostly abso rbed by manga nese-zinc ferrite shell to produce reactive oxygen species(ROS),which is essential to the potential PDT and CDT effect of nanosystems,and at the same time,Mn_(0.5)Zn_(0.5)Fe2O_(4) can further react with H_(2)O_(2) to promote the efficiency of *** is expected that UCNPS@M@DA can act as upconversion luminescence imaging guidance due to the visible emission from *** addition,the energy absorbed by the nanosystems can be transferred to heat to realize photothermal ***,UCNPS@M@DA was successfully applied as a T_(1)/T_(2)-weighted magnetic resonance imaging(MRI)contrast agent due to the existence of Gd,Mn,and Fe *** light of the upconversion luminescence(UCL)imaging from the UCNPS as well as potential PTT,PDT,CDT effect mentioned above,this work provides a possibility to realize cancer multi-model bioimaging guided treatment by using an all-in-one diagnosis and therapy nanosystem through a simple yet powerful strategy.

关键词： manganese-zinc ferrite Upconversion nanoparticles Photothermal effect Reactive oxygen species Good biocompatibility Rare earths

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Effect of sintering process on microstructure and magnetic properties of high frequency power ferrite

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Rare Metals 2006年第z1期25卷 509-514页

作者： SUN Ke LAN Zhongwen CHEN Shengming SUN Yueming YU Zhong State Key Laboratory of Electronic Thin Films and Integrated Devices UESTCChengdu 610054China Jiangsu Research Center of Magnetic Materials and Devices Engineering and Technology Wuxi 214199China

An oxide ceramic process was adopted to prepare high frequency manganese-zinc(MnZn)power *** combination with the microstructure analysis of material,the influences of sintering process on initial permeability(μ_(i))and high frequency loss in unit volume(P_(cv))of MnZn power ferrite were *** results show that in order to obtain fine microstructure and high frequency properties,the preferable sintering temperature and atmosphere are 1230℃and oxygen partial pressure(P_(O_(2)))of 4%,respectively.

关键词： manganese-zinc ferrite microstructure initial permeability sintering process

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Graphene-Doped high-efficiency absorbing material:C-Mn0.5Zn0.5Fe2O4@PDA

Graphene-Doped high-efficiency absorbing material:C-Mn0.5Zn0...

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第十一届全国腐蚀与防护大会

作者：刘俊俊吴建华 Xianhui Zhang Bo Wu Yang Yang School of Marine Engineering Jimei University

MnZn ferrites and their magnetic,electrical and optical properties make them highly suitable in a number of *** ferrites are used in electronic applications,magnetic fluids and in household appliances such as washing machines,refrigerators and microwave *** paper focuses on a hydrothermal method used to prepare a bayberry spherical manganese-zinc ferrite (Mn0.5Zn0.5Fe2O4) It’s surface was coated with dopamine (MnZnFeO@PDA) and then carbonized to obtain the core-shell structure C-MnZnFeO@*** results show that carbon coated manganese-zinc ferrite with saturation magnetic properties and coercivity increased from 99 emu and 66.01 Oe to 138 emu and104.85 Oe *** addition,the carbonized MnZnFeO@PDA (C-MnZnFeO@PDA)exhibited favourable microwave absorbing performance with minimum reflection loss (RLmin) of-17.56dB and also revealed that the broadest effective absorption bandwidth (EAB) of 5.36 GHz (11.70–17.06GHz) can be achieved at 2.0 mm.

关键词： manganese-zinc ferrite graphene electromagnetic absorbing material

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