Structure-dependent fluorescence efficiencies of individual single-walled cardon nanotubes
Structure-dependent fluorescence efficiencies of individual single-walled cardon nanotubes
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DOI：
10.1021/nl071561s
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发表时间：
2007-10-01
期刊：
影响因子：
10.8
通讯作者：
Weisman, R. Bruce
中科院分区：
文献类型：
--
作者：
Tsyboulski, Drnitri A.;Rocha, John-David R.;Weisman, R. Bruce
采用单纳米管光度法测量了 SDBS 水悬浮液中 12 (n,m) 结构种类的半导体单壁碳纳米管的吸收截面和荧光量子产率的乘积。这些产物的范围为 1.7 至 4.5 x 10(-19) cm(2)/C 原子，通常随着能隙定律所述的光学带隙而增加。研究结果表明，最亮的 (10,2) 物种的荧光量子产率接近 8%，并引入了从整体荧光强度推导出定量 (n,m) 分布所需的经验校准因子。
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 x 10(-19) cm(2)/C atom, generally increasing with optical band gap as described by the energy gap law. The findings suggest fluorescent quantum yields of similar to 8% for the brightest, (10,2) species and introduce the empirical calibration factors needed to deduce quantitative (n,m) distributions from bulk fluorimetric intensities.