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

Qiaoliang Bao, Jun Zhang, Chunxu Pan, Jun Li, Chang Ming Li, Jianfeng Zang, Ding Yuan Tang

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21 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)10347-10352
Number of pages6
JournalJournal of Physical Chemistry C
Volume111
Issue number28
DOIs
Publication statusPublished - 19 Jul 2007
Externally publishedYes

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