Light-harvesting function of β-carotene inside carbon nanotubes explored by femtosecond absorption spectroscopy

被引：15

作者：

Abe, Kenta ^{[1
]}

Kosumi, Daisuke ^{[1
]}

Yanagi, Kazuhiro ^{[2
,3
]}

Miyata, Yasumitsu ^{[2
,3
]}

Kataura, Hiromichi ^{[2
,3
]}

Yoshizawa, Masayuki ^{[1
,3
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Phys, Aoba Ku, Sendai, Miyagi 9808578, Japan

[2] Natl Inst Adv Ind Sci & Technol, Nanotechnol Inst, Tsukuba, Ibaraki 3058562, Japan

[3] JST, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.77.165436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single-walled carbon nanotubes (SWCNTs) encapsulating beta-carotene are attractive components for enhancing optical functionalities of SWCNTs. We have investigated ultrafast dynamics of light-harvesting function of beta-carotene. The relaxation kinetics of beta-carotene is faster in SWCNTs than in nonpolar solvent. The absorbance change due to SWCNTs increases with the encapsulation because of excited energy transfer from beta-carotene. The energy transfer rates from the 1 B-1(u)+ and 2 (1)A(g)(-) excited states of beta-carotene to SWCNTs are determined to be (50 fs)(-1) and (6.6 ps)(-1), respectively.

引用

页数：6

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