Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
Volume 60, Issue 8, Pages 1301-1304Publisher
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.60.1301
Keywords
Carbon nanotube; Surfactant; Dispersion; Photoluminescence; Raman
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Funding
- Chung-Ang University
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Raman and photoluminescence (PL) spectra of HiPCO and CoMoCat single-walled carbon nanotubes (SWCNTs) dispersed in 1 wt% aqueous surfactant solutions with five different surfactants were studied. The SWCNT suspensions exhibit almost the same Raman spectra, regardless of the surfactant used, but the PL peak positions of all the observed (7,5), (6,5), (8,3), (9,1), and (6,4) SWCNTs show strong surfactant-dependent shifts as large as similar to 19 meV, known as solvatochromic shifts. For SWCNTs dispersed in deoxycholate sodium salts and sodium dodecyl sulfate solutions, the amount of the solvatochromic shift decreases as the excitation laser power is increased.
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