由于碳纳米管特殊的中空结构及高的比表面积，其对气体与液体的吸附有极大的先天优势。研究了不同环境下碳纳米管纤维对氧气与水分的吸附与解吸过程中其电子特性变化。电弧实验表明，碳纳米管纤维在较低电压(≤30 V)与相应电流下(＜2 A)可以产生强烈电弧，同时局部产生高温；高温易使纤维对氧气产生解吸，从而引起纤维电阻增大。室温条件下碳纳米管纤维对空气中水分子的吸附较对氧分子要强，水分子吸附增加了其表面羟基基团，使得其内部空穴数量减少，导电性降低，纤维电阻增大。
Carbon-nanotubes (CNTs)had great advantages on the adsorption of gas and liquid for its special hol-low structure and high specific surface area.Electronic properties of CNT fibers were related to the concentra-tion of oxygen and moisture during the adsorption and desorption process under different conditions.CNT fibers had greater adsorption to moisture than to oxygen at room temperature;the adsorption moisture increases the number of hydroxyl group and decreases the holes number of the CNT fibers surface,resulting in the decrease of conductivity of CNT fibers.At high temperature,CNT fibers prone to oxygen desorption,and that leads to its resistance increase.Arc experimental results also showed that CNT fibers can produce intensive electric arc accompanied with great energy at low voltage (≤30 V)and corresponding current (<2 A),and that show the great application prospect of CNT fibers in electric arc industry.
参考文献
| [1] | Sumio I .Helical microtubles of graphitic carbon[J].Na-ture,1991,354:56-58. |
| [2] | Shu Peng;James O.Carbon nanotube chemical and me-chanical sensors[A].London,2001:1-8. |
| [3] | Cantalini C.;Valentini L.;Armentano I.;Lozzi L.;Kenny JM.;Santucci S. .Sensitivity to NO2 and cross-sensitivity analysis to NH3, ethanol and humidity of carbon nanotubes thin film prepared by PECVD[J].Sensors and Actuators, B. Chemical,2003(1/3):195-202. |
| [4] | Y.M. Wong;W.P. Kang;J.L. Davidson;A. Wisitsora-at;K.L. Soh .A novel microelectronic gas sensor utilizing carbon nanotubes for hydrogen gas detection[J].Sensors and Actuators, B. Chemical,2003(1/3):327-332. |
| [5] | S. G. Wang;Qing Zhang;D. J. Yang .Multi-walled carbon nanotube-based gas sensors for NH_3 detection[J].Diamond and Related Materials,2004(4/8):1327-1332. |
| [6] | Sun M L .Adsorption of phenol and a-naphthol on carbon nanotubes[J].Chemical World,2005,10:580-687. |
| [7] | 裘凯栋,黎维彬.水溶液中六价铬在碳纳米管上的吸附[J].物理化学学报,2006(12):1542-1546. |
| [8] | 曾卫环,王红娟,彭峰.碳纳米管对铅离子的吸附性能研究[J].广东化工,2005(01):9-11. |
| [9] | Collins PG. Zettl A. Bando H. Thess A. Smalley RE. .NANOTUBE NANODEVICE[J].Science,1997(5335):100-103. |
| [10] | Collins P G;Bradley K .Extreme oxygen sensitivity of e-lectronic properties of carbon nanotubes[J].SCIENCE,2010,287(5459):1801-1804. |
| [11] | Ranjit Pati;Yiming Zhang;Saroj K. Nayak;Pulickel M. Ajayan .Effect of H_(2)O adsorption on electron transport in a carbon nanotube[J].Applied physics letters,2002(14):2638-2640. |
| [12] | Wang Y.;Wei F.;Luo GH.;Yu H.;Gu GS. .The large-scale production of carbon nanotubes in a nano-agglomerate fluidized-bed reactor[J].Chemical Physics Letters,2002(5-6):568-572. |
| [13] | M. Tanemura;K. Iwata;K. Takahashi;Y. Fujimoto;F. Okuyama;H. Sugie;V. Filip .Growth of aligned carbon nanotubes by plasma-enhanced chemical vapor deposition: Optimization of growth parameters[J].Journal of Applied Physics,2001(3):1529-1533. |
| [14] | Lee CJ.;Cho YR.;Lee JH.;Cho KI.;Lyu SC. .Diameter-controlled growth of carbon nanotubes using thermal chemical vapor deposition[J].Chemical Physics Letters,2001(3-4):245-249. |
| [15] | Wei B Q;Vajtai R;Jung Y et al.Microfabrication technology:organized assembly of carbon nanotubes[J].NATURE,2002,416(6880):495-496. |
| [16] | Anyuan Cao;Xianfeng Zhang;Cailu Xu;Ji Liang;Dehai Wu;Xihua Chen;Bingqing Wei;P. M. Ajayan .Grapevine-like growth of single walled carbon nanotubes among vertically aligned multiwalled nanotube arrays[J].Applied physics letters,2001(9):1252-1254. |
| [17] | Wu Ziping .Synthetic of transparent carbon nanotubes of macroscopic continuum[P].China:ZL201010230938.4,2010-07-07. |
| [18] | Li YL;Kinloch IA;Windle AH .Direct spinning of carbon nanotube fibers from chemical vapor deposition synthesis[J].Science,2004(5668):276-278. |
| [19] | Jang E Y;Kang T J .Macroscopic single-walled-carbon-nanotube fiber self-assembled by dip-coating method[J].Advanced Materials,2009,21(43):4357-4361. |
| [20] | Krzysztof Koziol;Juan Vilatela;Anna Moisala;Marcelo Motta;Philip Cunniff;Michael Sennett;Alan Windle .High-Performance Carbon Nanotube Fiber[J].Science,2007(5858):1892-1895. |
| [21] | Wu Ziping;Zhang Weibo;Zhao Man et al.Excellent e-lectrode material of carbon nanotube macro-fibers for e-lectric arc generator[J].Journal of Applied Physics,2014,115:01-05. |
| [22] | 黄钦文,吴军,陈大鹏,陈永胜,叶甜春.氧气吸附对碳纳米管电子特性的影响[J].电子器件,2007(06):1981-1984. |
| [23] | Tans SJ.;Verschueren ARM.;Dekker C. .Room-temperature transistor based on a single carbon nanotube[J].Nature,1998(6680):49-52. |
| [24] | 胡建昌,张蓉,殷鹏飞,李银冰.CaCO3粉体气流粉碎/静电分散粒径分布规律研究[J].功能材料,2013(13):1928-1931. |
| [25] | 叶芸,肖晓晶,郭太良,黎威志,蒋亚东.碳纳米管表面化学镀银及场发射性能研究[J].功能材料,2012(09):1221-1224. |
| [26] | 吴茂江.氢键缔合水分子与水的反常膨胀探析[J].山西大同大学学报（自然科学版）,2011(03):33-36. |
| [27] | Brown S D M;Corio P;Marucci A et al.Anti-stokes Raman spectra of single-walled carbon nanotubes[J].Physical Review B,2001,63:153401. |
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