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Recoverable photoluminescence of flame-synthesized multiwalled carbon nanotubes and its intensity enhancement at 240 K

被引：22
作者：
Bao, Qiaoliang
Zhang, Jun
Pan, Chunxu [1 ]
Li, Jun
Li, Chang Ming
Zang, Jianfeng
Tang, Ding Yuan
机构：
[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Ctr Adv Bionanosyst, Singapore 639798, Singapore
[3] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
[4] Wuhan Univ, Key Lab Acoust & Photon Mat & Dev, Minist Educ, Wuhan 430072, Peoples R China
[5] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
[6] Nanyang Technol Univ, Ctr Adv Bionanosyst, Singapore 639798, Singapore
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 28期
关键词：
INDUCED LIGHT-EMISSION; ETHANOL FLAMES; SIDEWALL FUNCTIONALIZATION; INDUCED LUMINESCENCE; POROUS SILICON; OXIDATION; DEFECTS; NANOFIBERS; GRAPHITE; SPECTRA;
D O I：
10.1021/jp071460i
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The photoluminescence (PL) of multiwalled carbon nanotubes (MWCNTs) synthesized with ethanol flames was investigated at temperatures from 30 to 300 K. Broad-band PL emission in the near-infrared region was observed at temperatures below 240 K. The PL intensity was abruptly boosted up at 240 K, and then quickly became quenched and undetectable as the temperature was further increased. The PL emission of the MWCNTs only appeared in the first cycle of the temperature rising. However, it could be recovered by exposing the sample in an oxygen-abundant environment. We propose that the PL emission of the MWCNTs is resulted from the carbon oxyhydride-like fluorophors bound to the MWCNTs surface.
引用
收藏
页码：10347 / 10352
页数：6
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