Photoluminescence recovery from single-walled carbon nanotubes on substrates.
Photoluminescence recovery from single-walled carbon nanotubes on substrates.
复制标题
基底上单壁碳纳米管的光致发光恢复。
DOI：
10.1021/ja074927b
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发表时间：
2007
影响因子：
15
通讯作者：
Zhongfan Liu
中科院分区：
文献类型：
--
作者：
Liming Xie;Cui Liu;Jin Zhang;Yongyi Zhang;Liying Jiao;Lai Jiang;L. Dai;Zhongfan Liu
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 β for electron transfer in SWNT/SAM/SiO2 system was obtained (β = 0.11, 0.14 A-1 for the emission region in 1380−1480 and 1480−1580 nm, respectively).
