Photoluminescence recovery from single-walled carbon nanotubes on substrates

被引：17

作者：

Xie, Liming ^{[1
]}

Liu, Cui ^{[1
]}

Zhang, Jin ^{[1
]}

Zhang, Yongyi ^{[1
]}

Jiao, Liying ^{[1
]}

Jiang, Lai ^{[1
]}

Dai, Lun ^{[1
]}

Liu, Zhongfan ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn,Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Key Lab Phys & Chem Nanodevices,CNST, Beijing 100871, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 41期

关键词：

D O I：

10.1021/ja074927b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have observed bright photoluminescence (PL) from single-walled carbon nanotubes (SWNTs) on self-assembly monolayer (SAM) functionized SiO2/Si substrates. By contrast, no PL was observed from pristine SWNTs grown on substrates (SiO2/Si and Al2O3). This suggests a successful blocking of substrate-induced nonradiative decay of excitons. PL recovery from transferred SWNTs on substrates is attributed to breaking chemical bonding between SWNTs and underlying substrates and blocking electron transfer from SWNTs to defect states in SiO2. By analyzing dependence of PL intensity on thickness of SAMs, key constant P for electron transfer in SWNT/SAM/SiO2 system was obtained (beta = 0.11, 0.14 angstrom-1 for the emission region in 1380-1480 and 1480-1580 nm, respectively).

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页码：12382 / +

页数：3

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