Brightly fluorescent single-walled carbon nanotubes via an oxygen-excluding surfactant organization

Sang Yong Ju, William P. Kopcha, Fotios Papadimitrakopoulos

Research output: Contribution to journalArticle

176 Citations (Scopus)

Abstract

Attaining high photoluminescence quantum yields for single-walled carbon nanotubes (SWNTs) in order to broaden their optoelectronics and sensing applications has been a challenging task. Among various nonradiative pathways, sidewall chemisorption of oxygen provides a known defect for exciton quenching through nanotube hole doping. We found that an aliphatic (dodecyl) analog of flavin mononucleotide, FC12, leads to high dispersion of SWNTs, which tend to aggregate into bundles. Unlike other surfactants, the surface organization of FC12 is sufficiently tight to exclude oxygen from the SWNT surface, which led to quantum yields as high as 20%. Toluene-dispersed, FC12-wrapped nanotubes exhibited an absorption spectrum with ultrasharp peaks (widths of 12 to 25 milli-electron volts) devoid of the characteristic background absorption of most nanotube dispersions.

Original languageEnglish
Pages (from-to)1319-1323
Number of pages5
JournalScience
Volume323
Issue number5919
DOIs
Publication statusPublished - 2009 Mar 18

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