[23a-B203-1~11] 17.1 Carbon nanotubes & other nanocarbon materials

△ [23a-B203-4] Wrapping polymer effects on excitonic photoluminescence energies in the defect doped sites of chemically functionalized single-walled carbon nanotubes

〇Yoshiaki Niidome¹, Hiromu Matsumoto¹, Koichiro Kato^1,2, Tsuyohiko Fujigaya^1,2,3, Tomohiro Shiraki^1,3 (1.Faculty of Engineering, Kyushu Univ., 2.CMS, Kyushu Univ., 3.WPI-I2CNER, Kyushu Univ.)

Keywords:carbon nanotube, defect, exciton

Defect doing to semiconducting single-walled carbon nanotubes (SWCNTs) though local chemical functionalization enhances their near infrared photoluminescence (PL) properties. Namely, the resultant locally functionalized SWCNTs (lf-SWCNTs) emit red-shifted and brighter PL compared to the intrinsic PL from non-doped SWCNTs. Recently, we observed highly sensitive PL energy shifts of lf-SWCNTs through dielectric environment changes. Here, various vinyl polymer derivatives are wrapped on lf-SWCNTs to investigate polymer wrapping environments on lf-SWCNTs based on the PL energy changes. The lf-SWCNTs are synthesized using aryldiazonium salts. When the polymer wrapping treatment for the synthesized lf-SWCNTs is conducted, PL energies shift to lower energy regions. Interestingly, the PL energy shifts differently appear depending on the structural differences of the used vinyl polymers, showing that unique polymer interactions could occur at the doped sites of lf-SWCNTs.