卤素掺杂对多壁碳纳米管导电性能的影响

石国娴; 徐学诚

卤素掺杂对多壁碳纳米管导电性能的影响

1.
华东师范大学物理系, 上海 200241

详细信息

中图分类号: Q948
计量
- 文章访问数: 1800
- HTML全文浏览量: 59
- PDF下载量: 2177
- 被引次数: 0
出版历程
- 收稿日期: 2012-12-01
- 修回日期: 2013-03-01
- 刊出日期: 2013-11-25

Influence of electrical conductivity of multi-walled carbon nanotubes by halogen-doping

SHI Guo-Xian XU Xue-Cheng,

1.
Departement of Physics，East China Normal University，Shanghai 200241，China

摘要

摘要: 通过气体吸附, 制备了掺氯、溴、碘的多壁碳纳米管材料. 与未掺杂多壁碳纳米管（MWNTs）相比, 掺氯MWNTs电导率提高到原来的5倍以上，掺溴MWNTs电导率提高到原来的3倍左右，掺碘对MWNTs电导率基本无影响. 用拉曼光谱和X光电子能谱(XPS)分析研究了卤素和MWNTs 间的相互作用. 同时研究了载流子浓度和迁移率对复合材料电导率的影响，结果表明：卤素的电负性越强，掺杂后多壁碳纳米管的载流子平均自由程提高越多，载流子迁移率提高越大；卤素与MWNTs之间的相互作用越强，产生的载流子越多，掺杂后的MWNTs载流子浓度提高越大.
- 多壁碳纳米管 /
- 卤素 /
- 载流子 /
- 迁移率 /
- 浓度 /
- 电导率
Abstract: Multi-walled carbon nanotubes (MWNTs) were doped by chlorine, bromine and iodine. Compared with the pristine MWNTs, the electrical conductivities of Cl2-MWNT and Br2-MWNTs were improved over 5 times and 3 times, respectively, while that of I2-MWNTs almost unchanged. The interaction between the halogen and MWNTs was analyzed by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Meanwhile, we also studied the carrier concentration and carrier mobility which may affect the conductivities of the composite. The results show that: When the halogen electronegativity become stronger, the mean free path of the carrier of doped MWNTs will be higher, as well as the carrier mobility. And the stonger the interaction between the halogen and MWNTs become, the more carriers will take part in conducting, which means the carrier concentration will be higher.
- MWNTs /
- halogen /
- carrier /
- mobility /
- concentration /
- conductivity

HTML全文

参考文献(1)

[1]

［1］ IIJIMA S. Helical microtubules of graphitic carbon［J］. Nature(London). 1991, 354(6348): 56-58.

［2］辜萍,王宇,李广海. 碳纳米管的力学性能及碳纳米管复合材料研究［J］. 力学进展, 2002, 32(4): 563-578

［3］ LI C S, WANG D Z, WANG X F, et al. Controlled electrochemical oxidation for enhancing the capacitance of carbon nanotube composites ［J］. Carbon, 2005, 43(7): 1557-1560. ［4］ ISHII S, WATANABE T, UEDA S, et al. Resistivity reduction of boron-doped multiwalled carbon nanotubes synthesized from a methanol solution containing boric acid ［J］. Applied Physics Letters, 2008, 92(20): 202116-202116-3.

［5］ CHOI J, SAMAYOA I A, LIM S C, et al. Band filling and correlation effects in alkali metal doped canbon nanotubes ［J］. Physics Letters A, 2002, 299(5-6): 601-601.

［6］ BARBERIO M, BARONE P, BONANNO A, et al. Transport properties of alkali-doped single-wall carbon nanotube mats ［J］. Superlattices and Microstructures, 2009, 46(1-2): 369-373.

［7］ PETACCIA L, GOLDONI A, LIZZITT S, et al. Electronic properties of clean and Li-doped single-walled carbon nanotubes ［J］. Journal of Electron Spectroscopy and Related Phenomena, 2005, 144(SI): 793-797.

［8］ YANG S B, KONG B S, KIM D W, et al. Effect of Au Doping and Defects on the Conductivity of Single - Walled Carbon Nanotube Transparent Conducting Network Films ［J］. J Phys Chem C, 2010, 114(20):9296-9300.

［9］ XIAO Y, YAN X H, DING J W. Codoping of potassium and bromine in carbon nanotubes: A density functional theory study ［J］. Chinese Physics Letters, 2007, 24(12): 3506-3508.

［10］ SHULGA Y M, TIEN T C , HUANG C C. XPS study of fluorinated carbon multi-walled nanotubes ［J］. Jounal of Electron Spectroscopy and Related Phenomena, 2007, 160(1-3): 22-28.

［11］高建生, 徐学诚.氯掺杂提高多壁碳纳米管的电导率［J］. 化学学报, 2011, 69(12): 1403-1407.

［12］唐国强, 晋圣松,徐学诚, 等. 溴吸附对碳纳米管导电性能的提高［J］. 化学学报, 2007, 65(23): 2776-2780.

施引文献

资源附件(0)

访问统计