Terahertz absorption and dispersion of fluorine-doped single-walled carbon nanotube

We present experimental and theoretical results on the absorption and dispersion of a single-walled carbon nanotube (SWNT) with and without fluorine (F) doping in the frequency range of 0.2–3THz. Under the doping conditions, the power absorption, index of refraction, and the real and imaginary parts of the conductivity are decreased compared to those for pure SWNTs because the charge transfer to the F2 molecule will be increased. Our measurement of pure SWNT agrees well with the Maxwell-Garnett and Drude models. However, the F-doped SWNT requires adding a Lorentz oscillator term for good agreement between theory and measurement.

[1]  Joo-Hiuk Son,et al.  Optical and electrical properties of preferentially anisotropic single-walled carbon-nanotube films in terahertz region , 2004 .

[2]  Young Hee Lee,et al.  Atomic and electronic structures of fluorinated single-walled carbon nanotubes , 2003 .

[3]  J. Baldwin,et al.  Thermal Fluorination and Annealing of Single-Wall Carbon Nanotubes , 2003 .

[4]  K. An,et al.  Structural transformation of fluorinated carbon nanotubes induced by in situ electron-beam irradiation. , 2003, Journal of the American Chemical Society.

[5]  Keun Soo Kim,et al.  Modification of Electronic Structures of a Carbon Nanotube by Hydrogen Functionalization , 2002 .

[6]  K. An,et al.  X-ray photoemission spectroscopy study of fluorinated single-walled carbon nanotubes , 2002 .

[7]  Joo-Hiuk Son,et al.  Terahertz conductivity of anisotropic single walled carbon nanotube films , 2002 .

[8]  Christopher R. So,et al.  High Coverages of Hydrogen on (10,0), (9,0) and (5,5) Carbon Nanotubes , 2002 .

[9]  M. Meyyappan,et al.  Functionalization of Carbon Nanotubes Using Atomic Hydrogen from a Glow Discharge , 2002 .

[10]  D. Grischkowsky,et al.  Electrical and optical characterization of conducting poly-3-methylthiophene film by THz time-domain spectroscopy , 2001 .

[11]  Seong Chu Lim,et al.  Transport phenomena in an anisotropically aligned single-wall carbon nanotube film , 2001 .

[12]  Yoon,et al.  Crossed nanotube junctions , 2000, Science.

[13]  O. Hilt,et al.  Localized and Delocalized Charge Transport in Single-Wall Carbon-Nanotube Mats , 2000, cond-mat/0001222.

[14]  Andrew G. Rinzler,et al.  Far-Infrared gaps in single-wall carbon nanotubes , 1999 .

[15]  M. Terrones,et al.  Large-Scale Synthesis of Carbon Nanotubes by Pyrolysis , 1999 .

[16]  A. Rinzler,et al.  Fluorination of single-wall carbon nanotubes , 1998 .

[17]  Daniel R. Grischkowsky,et al.  Characterization of optically dense, doped semiconductors by reflection THz time domain spectroscopy , 1998 .