Structure-Dependent Fluorescence Efficiencies of Individual Single-Walled Carbon Nanotubes

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• 作者：Dmitri A. Tsyboulski ; John-David R. Rocha ; Sergei M. Bachilo ; Laurent Cognet ; R. Bruce Weisman
• 刊名：Nano Letters
• 出版年：2007
• 出版时间：October 2007
• 年：2007
• 卷：7
• 期：10
• 页码：3080 - 3085
• 全文大小：160K
• 年卷期：v.7,no.10(October 2007)
• ISSN：1530-6992

文摘

Single-nanotube photometry was used to measure the product of absorption cross section and fluorescence quantum yield for 12 (n,m)structural species of semiconducting single-walled carbon nanotubes in aqueous SDBS suspension. These products ranged from 1.7 to 4.5× 10^-19 cm²/C atom, generally increasing with optical band gap as described by the energy gap law. The findings suggest fluorescent quantumyields of ~8% for the brightest, (10,2) species and introduce the empirical calibration factors needed to deduce quantitative (n,m) distributionsfrom bulk fluorimetric intensities.