| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
Fluorescence of semiconducting single-wall carbon nanotubes (SWCNTs) drastically changes with variations in the tube structure. In this work, we focused on the polymer wrapping technique allowing selective dispersion of specific SWCNTs, and then expanded the technique into large-diameter SWCNTs. We have investigated the mechanism on the tube-structure selectivity of polymers using optical spectroscopy and atomic force microscopy. Consequently, we can selectively extract 1.5-μm fluorescent SWCNTs and specific semiconducting SWCNTs with encapsulated molecules through fluorene-based copolymer wrapping. In addition, fluorescence lifetime measurements of encapsulated perylene have revealed that the characteristic fluorescence in dimeric perylene chains at room temperature is caused by self-trapped exciton states. These results indicate that the development of selective synthesis techniques is important for the formation of specific molecular arrangement in SWCNTs.
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