通过电纺纤维自组装制备了具有强磁性敏感性的 Fe3 O 4＠SiO 2复合纳米颗粒．电纺纤维的形貌通过扫描电镜(SEM)进行表征.纳米颗粒的尺寸分布,形貌和磁性分别通过 FESEM、TEM 和 VSM 进行确定.结果显示,该复合纳米颗粒具有近似球形的结构,并且具有多个磁性内核被包覆其中.纳米颗粒的尺寸大约为40 nm.Fe3 O 4＠SiO 2复合颗粒典型的比饱和磁化强度高达43．842 A?m2/kg,并且其在室温下具有超顺磁性.由于该磁性纳米颗粒具有强磁性敏感性,它们势必可以应用于更加广泛的领域.
We fabricated the self-assembled Fe3O4 @SiO2 magnetic composite particles with high magnetic sensi-tivity from electrospun fibers.The morphology of the fibers was characterized by SEM.The size distribution, morphology and magnetic characteristics of the nanoparticles were determined with FE-SEM,TEM,and VSM, respectively.The results show that the composite nanoparticles have approximately spherical shapes with many magnetic cores inside them.The size distribution of the nanoparticles averaged around 45 nm.The typical satu-ration magnetization of the Fe3O4 @SiO2 composite particles is up to 43.842 A?m2/kg,with superparamagnet-ic properties being observed at room temperature.Since the nanoparticles have high magnetic sensitivity,they have much promise for use in a wide range of applications.
参考文献
| [1] | Liu, J.;Qiao, S.Z.;Hu, Q.H.;Lu, G.Q. .Magnetic nanocomposites with mesoporous structures: Synthesis and applications[J].Small,2011(4):425-443. |
| [2] | Swadeshmukul Santra;Rovelyn Tapec;Nikoleta Theodoropulou;Jon Dobson;Arthur Hebard;Weihong Tan .Synthesis and Characterization of Silica-Coated Iron Oxide Nanoparticles in Microemulsion: The Effect of Nonionic Surfactants[J].Langmuir: The ACS Journal of Surfaces and Colloids,2001(10):2900-2906. |
| [3] | St?ber W;Fink A;Bohn E .Controlled growth of mono-disperse silica spheres in the micron size range[J].Jour-nal of Colloid and Interface Science,1968,26(1):62-69. |
| [4] | Yu Lu;Yadong Yin;Brian T. Mayers;Younan Xia .Modifying the Surface Properties of Superparamagnetic Iron Oxide Nanoparticles through A Sol-Gel Approach[J].Nano letters,2002(3):183-186. |
| [5] | Dong Yang;Jianhua Hu;Shoukuan Fu .Controlled Synthesis of Magnetite-Silica Nanocomposites via a Seeded Sol-Gel Approach[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(18):7646-7651. |
| [6] | Jaeyun Kim;Hoe Suk Kim;Nohyun Lee .Multifunctional Uniform Nanoparticles Composed of a Magnetite Nanocrystal Core and a Mesoporous Silica Shell for Magnetic Resonance and Fluorescence Imaging and for Drug Delivery[J].Angewandte Chemie,2008(44):8438-8441. |
| [7] | Jaeyun Kim;Ji Eun Lee;Jinwoo Lee;Jung Ho Yu;Byoung Chan Kim .Magnetic Fluorescent Delivery Vehicle Using Uniform Mesoporous Silica Spheres Embedded with Monodisperse Magnetic and Semiconductor Nanocrystals[J].Journal of the American Chemical Society,2006(3):688-689. |
| [8] | Chang B;Sha X;Guo J et al.Thermo and pH dual re-sponsive,polymer shell coated,magnetic mesoporous sil-ica nanoparticles for controlled drug release[J].Journal of Materials Chemistry,2011,21:9239-9247. |
| [9] | McKee MG;Layman JM;Cashion MP;Long TE .Phospholipid nonwoven electrospun membranes[J].Science,2006(5759):353-355. |
| [10] | Lu, XF;Wang, C;Wei, Y .One-Dimensional Composite Nanomaterials: Synthesis by Electrospinning and Their Applications[J].Small,2009(21):2349-2370. |
| [11] | Hess H .Self-assembly driven by molecular motors[J].SOFT MATTER,2006,2(8):669-677. |
| [12] | Yu, D.-G.;Zhu, L.-M.;Bligh, S.W.A.;Branford-White, C.;White, K.N. .Coaxial electrospinning with organic solvent for controlling the size of self-assembled nanoparticles[J].Chemical communications,2011(4):1216-1218. |
| [13] | Yu, D.-G.;Branford-White, C.;Williams, G.R.;Bligh, S.W.A.;White, K.;Zhu, L.-M.;Chatterton, N.P. .Self-assembled liposomes from amphiphilic electrospun nanofibers[J].Soft matter,2011(18):8239-8247. |
| [14] | Kang Y S;Risbud S;Rabolt J F et al.Synthesis and characterization of nanometer-size Fe3 O 4 and gamma-Fe2 O 3 particles[J].Chemistry of Materials,1996,8(9):2209-2211. |
| [15] | Natacha Lang;Alain Tuel .A Fast and Efficient Ion-Exchange Procedure To Remove Surfactant Molecules from MCM-41 Materials[J].Chemistry of Materials,2004(10):1961-1966. |
| [16] | Bai J;Li YX;Zhang CQ;Liang XF;Yang QB .Preparing AgBr nanoparticles in poly(vinyl pyrrolidone) (PVP) nanofibers[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2008(3):165-168. |
| [17] | Mashkoor Ahmad;Caofeng Pan;Zhixiang Luo .A Single ZnO Nanofiber-Based Highly Sensitive Amperometric Glucose Biosensor[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(20):9308-9313. |
| [18] | Wang, H.;Li, Y.;Sun, L.;Li, Y.;Wang, W.;Wang, S.;Xu, S.;Yang, Q. .Electrospun novel bifunctional magnetic-photoluminescent nanofibers based on Fe_2O_3 nanoparticles and europium complex[J].Journal of Colloid and Interface Science,2010(2):396-401. |
| [19] | Minora Miyauchi;Trevor J. Simmons;Jianjun Miao .Electrospun Polyvinylpyrrolidone Fibers with High Concentrations of Ferromagnetic and Superparamagnetic Nanoparticles[J].ACS applied materials & interfaces,2011(6):1958-1964. |
| [20] | Tapas Sen;Antonio Sebastianelli;Ian James Bruce .Mesoporous Silica-Magnetite Nanocomposite:Fabrication and Applications in Magnetic Bioseparations[J].Journal of the American Chemical Society,2006(22):7130-7131. |
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