Directly Measured Optical Absorption Cross Sections for Structure-Selected Single-Walled Carbon Nanotubes

作者：Streit Jason K; Bachilo Sergei M; Ghosh Saunab; Lin Ching Wei; Weisman R Bruce^*

来源：Nano Letters, 2014, 14(3): 1530-1536.

DOI：10.1021/nl404791y

• SWCNT
• single-walled carbon nanotubes
• absorption cross section
• molar absorptivity
• quantitative analysis
• oscillator strength

We have measured peak and spectrally integrated absolute absorption cross sections for the first (E-11) and second (E-22) optical transitions of seven semiconducting single-walled carbon nanotube (SWCNT) species in bulk suspensions. Species-specific concentrations were determined using short-wave IR fluorescence microscopy to directly count SWCNTs in a known sample volume. Measured cross sections per atom are inversely related to nanotube diameter. E-11 cross sections are larger for mod 1 species than for mod 2; the opposite is found for E-22.

• 出版日期2014-3