采用自制的实验装置，通过阳极弧放电等离子体技术成功制备了Ni纳米颗粒填充的碳纳米管，利用高分辨透射电子显微镜（HRTEM）、XRD、TEM、X射线能量色散分析谱仪（XEDS）和振动样品磁强计（VSM）等测试手段对样品的化学成分、形态、微观结构和磁性能进行了表征。实验结果表明，采用本文中实验方法能获得大量被纳米金属颗粒填充的碳纳米管，其内部填充物为面心立方（FCC）结构的纳米Ni颗粒，外围薄层为石墨碳层。碳纳米管的外径为30-40nm，壁厚5～8nm，内部填充的纳米颗粒呈球形和椭球形，粒径均匀，在管腔内不连续分布。产物具有顺磁特性，矫顽力是78Oe，饱和磁化强度是33enu／g。
Ni nanoparticles filled carbon nanotubes were successfully prepared by the anodic arc discharging plasma utilizing self-designed and fabricated experimental apparatus. The composition, morphology, microstructure and magnetic properties of the products by this process were investigated via the high-resolution transmission electron microscopy (HRTEM), XRD, TEM, X-ray energy dispersive spectrometry (XEDS) and vibration sample magnetmeter (VSM). The experiment results show that most of the products are filled with the metallic nanoparticles, while the particles inside are face centered cubic(FCC) structure Ni, and the outside are wellgraphitized nanotubes. The diameter of carbon nanotubes ranges from 30 nm to 40 nm, with the wall thickness approximately 5-8 nm. The particles encapsulated in carbon nanotubes are scattered and noncontinuous homogeneously in spherical or ellipsoidal shapes. Magnetic property tests show that the products is super paramagnetic, with the eoercivities of 78 Oe and the saturation magnetization of 33 emu/g.
参考文献
| [1] | Baker C, Hasanain S K,Ismat S S. The magnetic behavior ofiron oxide passivated iron nanoparticles [J]. Journal ofApplied Physics. 2004, 96(11): 6657-6662. |
| [2] | Dravid V P, Host J J, Teng M, et al. Controlled - sizenanocapsules [J], Nature, 1995,374(6523) : 602-605. |
| [3] | Saito Y. Nanoparticles and filled nanocapsules [J]. Carbon,1995, 33(7): 979-988. |
| [4] | Lijima S. Holical microtubeles of graphitic carbon [J].Nature, 1991, 354: 56-58. |
| [5] | Ruoff R S,Lorents D C,Chan B, et al. Single crystal metalsencapsulated in carbon nanoparticles [J]. Science, 1993,259 ;346-348. |
| [6] | Subramoney S. Novel nanotubes structure, properties andpotentials applications [J]. Adv Mater, 1998, 10(15).. 1157- 1171. |
| [7] | Koga K, Gao G T,Tanaka H,et al. Formation of ordered icenanotubes inside carbon nanotubes [J]. Nature,2001, 412(6849): 802-805. |
| [8] | Monthioux M. Filling single - wall carbon nanotubes [J].Carbon, 2002, 40: 1809-1823. |
| [9] | Kozhuharova R, Ritschel M, Elefant D, et al. (FeCoi-a:)-alloy filled vertically aligned carbon nanotubes grown bythermal chemical vapor deposition [J]. J Magn Magn Mater,2005, 290: 250-253. |
| [10] | Oliete P B,Rojas T C,Fernandez A. Characterization andmagnetic behaviour of nickel nanoparticles encapsulated incarbon [J]. Acta Materialia, 2004,52: 2165-2171. |
| [11] | Bystrzejewski M, Huczko A, Lange H. Large scalecontinuous synthesis of carbon - encapsulated magneticnanoparticles [ J ]. Nanotechnology,2007, 18: 145608 -145617. |
| [12] | Che R C,Peng L M,Duan X F, et al. Microwave absorptionenhancement and complex permittivity and permeability of Feencapsulated within carbon nanotubes [J]. Adv Mater, 2004,. |
| [13] | Ajayan P M, Iijima S. Capillarity - induced filling of carbonnanotubes [J]. Nature, 1993, 361 : 333-334. |
| [14] | Wu H Q, Wei X W, Shao M W. et al. Synthesis of copperoxide nanoparticles using carbon nanotubes as templates [JJ.Chem Phys Lett, 2002,364(1/2): 152-156. |
| [15] | Hsu W K, Hare J P, Terrones M, et al. Condensed - phasenanotubes [J]. Nature, 1995,377 : 687-689. |
| [16] | Hsin Y L, Hwang K C,Chen F R, et al. Production and in-situ metal filling of carbon nanotubes in water [J]. AdvMater, 2001,13(11): 830-833. |
| [17] | Hernadi K,Fonseca A, Nagy J B,et al. Fe-catalyzed carbonnanotube formation [J]. Carbon, 1996, 34(10) : 1249-1257. |
| [18] | Matsui K,Pradhan B K, Kyotani T,et al. Formation ofnickel oxide nanoribbons in the cavity of carbon nanotubes[J]. J Phys Chem B, 2001,105(24): 5682-5688. |
| [19] | Yoshida N. Improvement of MFM tips using Fe-alloy-cappedcarbon nanotubes [J], Physica B, 2002,323: 149-150. |
| [20] | Wei Z Q, Xia T D, Bai L F,et al. Efficient preparation for Ninanopowders by anodic arc plasma [J]. Materials Letters,2006, 60(3): 766-770. |
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