Photoluminescence enhancement of aligned arrays of single-walled carbon nanotubes by polymer transfer

被引：10

作者：

Schweiger, Manuel ^{[1
,2
]}

Zakharko, Yuriy ^{[1
,2
]}

Gannott, Florentina ^{[1
,2
]}

Grimm, Stefan B. ^{[1
,2
]}

Zaumseil, Jana ^{[2
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, D-91058 Erlangen, Germany

[2] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany

来源：

NANOSCALE | 2015年 / 7卷 / 40期

基金：

欧洲研究理事会;

关键词：

QUARTZ; SUBSTRATE; STRAIN; TRANSISTORS; EXCITONS; DENSITY; GROWTH;

D O I：

10.1039/c5nr05163k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photoluminescence of as-grown, aligned single-walled carbon nanotubes (SWNTs) on quartz is strongly quenched and barely detectable. Here we show that transferring these SWNTs to another substrate such as clean quartz or glass increases their emission efficiency by up to two orders of magnitude. By statistical analysis of large nanotube arrays we show at what point of the transfer process the emission enhancement occurs and how it depends on the receiving substrate and the employed transfer polymer. We find that hydrophobic polystyrene (PS) as the transfer polymer results in higher photoluminescence enhancement than the more hydrophilic poly(methyl methacrylate) (PMMA). Possible mechanisms for this enhancement such as strain relief, disruption of the strong interaction of SWNTs with the substrate and localized emissive states are discussed.

引用

页码：16715 / 16720

页数：6

共 37 条

[1] The Role of the Oxygen/Water Redox Couple in Suppressing Electron Conduction in Field-Effect Transistors [J].