通过实现不同条件下的电弧放电,用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对阴极沉积物中碳管的形貌和微结构进行表征,得到碳管的形貌和微结构与放电条件之间的一些对应关系.提出整体温度较低的沉积物边缘具有较高的局部温度、较大的碳离子流,并提出阴极上存在边缘的场致冷阴极发射和边缘以内的热阴极发射,它们分别起到引起边缘硬壳的形成、为碳纳米管的生长提供必要条件的作用.通过深入理解电弧放电过程,从而制备高质量具有特定结构的碳纳米管.
参考文献
| [1] | KRATSCHMER W;LAMB L D;FOSTIROPOULOS K et al.Solid C60, a new form of carbon[J].Nature,1990,347(6291):354-358. |
| [2] | IIJIMA S .Helical microtubules of graphitic carbon[J].Nature,1991,354(6349):56-58. |
| [3] | Chang BH.;Zhou WY.;Qian LX.;Pan ZW.;Mao JM.;Li WZ.;Xie SS. .Loosely-entangled carbon nanotubes prepared in modified arc-discharge[J].Journal of Materials Science Letters,1998(12):1015-1017. |
| [4] | COLBERT D T;ZHANG J;MCCLURE S M et al.Growth and Sintering of Fullerene Nanotubes[J].Science,1994,266(5187):1218-1222. |
| [5] | Ajayan PM.;Ebbesen TW. .NANOMETRE-SIZE TUBES OF CARBON [Review][J].Reports on Progress in Physics,1997(10):1025-1062. |
| [6] | EBBESEN T W;AJAYAN P M .Large-scale synthesis ofcarbon nanotubes[J].Nature,1992,358(5633):220-222. |
| [7] | Gamaly EG.;Ebbesen TW. .MECHANISM OF CARBON NANOTUBE FORMATION IN THE ARC DISCHARGE[J].Physical Review.B.Condensed Matter,1995(3):2083-2089. |
| [8] | IIJIMA S;AJAYAN P M;ICHIHASHI T .Growth modelfor carbon nanotubcs[J].Phys Rev Lett,1992,56(21):3100-3103. |
| [9] | Tang Dong-Sheng;Zhou Wei-Ya;Ci Li-Jie .Morphological and microstructures of carbon nanotubes prepared by self-sustained arc discharging[J].Chinese physics,2002(5):496-501. |
| [10] | ENDO M;KROTO H W .Formation of Carbon Nanofibers[J].Journal of Physical Chemistry B,1992,96(15):6941-6944. |
| [11] | Tang DS.;Liu W.;Chang BH.;Sun LF.;Liu ZQ.;Wan G.;Zhou WY.;Xie SS. .Evidence for an open-ended nanotube growth model in arc discharge[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(3):480-483. |
| [12] | Dongsheng Tang;Sishen Xie;Weiya Zhou;Zuqin Liu;Lijie Ci;Xiaoqin Yan;Huajun Yuan;Zhenping Zhou;Yingxin Liang;Dongfang Liu;Wei Liu .Effect of cupped cathode on microstructures of carbon nanotubes in arc discharge[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(9):1609-1613. |
| [13] | TANG D S;XIE S S;CHANG B H et al.Effect ofacetylene in buffer gas on the microatructures of carbonnanotubes in arc discharge[J].Nanotechnology,2002,13(06):L1-L4. |
| [14] | D. Tang;L. Sun;J. Zhou .Two possible emission mechanisms involved in the arc discharge method of carbon nanotube preparation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(13):2812-2816. |
| [15] | WANG X K;LIN X W;DRAVID V P et al.Growth andcharacterization of buckybundles[J].Applied Physics Letters,1993,62(16):1881-1883. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%