TITLE

Frequency-dependent optical constants and conductivities of hydrogen-functionalized single-walled carbon nanotubes

AUTHOR(S)
Chul Kang; In Hee Maeng; Seung Jae Oh; Joo-Hiuk Son; Tae-In Jeon; Kay Hyeok An; Seong Chu Lim; Young Hee Lee
PUB. DATE
July 2005
SOURCE
Applied Physics Letters;7/25/2005, Vol. 87 Issue 4, p041908
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The frequency-dependent optical constants and electrical conductivities of hydrogen-functionalized single-walled carbon nanotubes (SWNTs) have been measured from the 0.2 to 1.5 THz region using a terahertz time domain spectroscopy. The indices of refraction and electrical conductivities of the sample after hydrogen functionalization were smaller than those of the sample before hydrogen functionalization. The experimental results were fitted using the Maxwell–Garnett model, and a reduction of plasma frequency was observed. This can be attributed to the fact that the hydrogen functionalization has reduced the number of free carriers with the bonding change from sp2 to sp3.
ACCESSION #
17782578

 

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