Sorting single-wall carbon nanotubes combining gel chromatography and density-gradient ultracentrifugation

2010 ◽  
Vol 247 (11-12) ◽  
pp. 2746-2749 ◽  
Author(s):  
Daisuke Nishide ◽  
Huaping Liu ◽  
Takeshi Tanaka ◽  
Hiromichi Kataura
Keyword(s):  
Carbon Nanotubes ◽  
Density Gradient ◽  
Single Wall Carbon Nanotubes ◽  
Gel Chromatography ◽  
Density Gradient Ultracentrifugation ◽  
Single Wall Carbon

scholarly journals Quantitative Analysis of Isolated Single-Wall Carbon Nanotubes with Their Molar Absorbance Coefficients

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Shota Kuwahara ◽  
Yuki Kuwahara ◽  
Hisanori Shinohara
Keyword(s):  
Carbon Nanotubes ◽  
Atomic Force Microscopy ◽  
Visible Region ◽  
Diameter Distribution ◽  
Single Wall Carbon Nanotubes ◽  
Density Gradient Ultracentrifugation ◽  
Single Wall Carbon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Spray Technique

The molar absorbance coefficients of metallic, semiconducting, and (6,5) chirality enriched single-wall carbon nanotubes were evaluated by a spray technique combined with atomic force microscopy. Single-wall carbon nanotubes with isolated and a single predominant electronic type were obtained by using the density-gradient ultracentrifugation technique. In the visible region, all coefficients had similar values around 2–5 × 109/mL mol−1 cm−1, independent of their diameter distribution and the electronic types of single-wall carbon nanotubes, and theεS22/εM11 andεS11/εM11were estimated to be 1.0 and 4.0, respectively. The coefficient strongly depends on the length of single-wall carbon nanotubes, independent of their electronic types and chirality.

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