Photoluminescence microscopy of carbon nanotubes grown by chemical vapor deposition:: Influence of external dielectric screening on optical transition energies

被引：47

作者：

Kiowski, Oliver

Lebedkin, Sergei ^{[1
]}

Hennrich, Frank

Malik, Sharali

Roesner, Harald

Arnold, Katharina

Suergers, Christoph

Kappes, Manfred M.

机构：

[1] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

[2] Univ Karlsruhe, Inst Phys Chem, D-76128 Karlsruhe, Germany

[3] Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany

[4] Ctr Funct Nanostruct, D-76128 Karlsruhe, Germany

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.75.075421

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photoluminescence (PL) laser microscopy was applied to determine optical transition energies E-11 and E-22 of individual semiconducting single-walled carbon nanotubes (SWNTs) suspended on top of carbon nanotube "forests," grown by chemical vapor deposition (CVD) on silicon substrates. A uniform increase of E-11 and E-22 energies by 40-55 and 24-48 meV, respectively, was found for 19 different (n,m) nanotube species suspended in air or a vacuum-relative to SWNTs in a reference water-surfactant dispersion. CVD-grown SWNTs embedded in paraffin oil and 1-methylnaphthalene show nearly the same PL peak positions as SWNTs in aqueous dispersion, indicating similar dielectric screening of excitons in SWNTs in these media.

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页数：7

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