Conference Proceeding

Nonlinear Optical Properties of SWCNTs Incorporated Silica Composites

02/2007; DOI:10.1109/NEMS.2007.352153 pp.855 - 859 In proceeding of: Nano/Micro Engineered and Molecular Systems, 2007. NEMS '07. 2nd IEEE International Conference on
Source: IEEE Xplore

ABSTRACT HiPco and Arc-made single-walled carbon nanotubes (SWCNTs) were incorporated into silica matrices via a conventional sol-gel method to form SWCNTs/silica composites. Optical absorption and FT-Raman spectroscopy revealed that purification process using acid treatment resulted in preferential removal of metallic SWCNTs and severe damage and/or side-wall functionalization of HiPco SWCNTs. Z-scan measurements of SWCNTs/silica composites showed self-defocusing and bleached absorption phenomena which indicated that both the real and imaginary parts of X3, the third-order nonlinear optical susceptibility, of these composites had negative sign.

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Keywords

acid treatment
 
Arc-made single-walled carbon nanotubes
 
conventional sol-gel method
 
form SWCNTs/silica composites
 
FT-Raman spectroscopy
 
HiPco
 
HiPco SWCNTs
 
imaginary parts
 
preferential removal
 
purification process
 
severe damage
 
SWCNTs/silica composites
 
third-order nonlinear optical susceptibility
 
Z-scan measurements
 

Jong Hyuk Yim