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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Recoverable Photoluminescence of Flame-Synthesized Multiwalled Carbon Nanotubes and Its Intensity Enhancement at 240 K
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Recoverable Photoluminescence of Flame-Synthesized Multiwalled Carbon Nanotubes and Its Intensity Enhancement at 240 K

机译：火焰合成的多壁碳纳米管的可恢复光致发光及其在240 K下的强度增强

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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.
机译：研究了在30至300 K的温度下用乙醇火焰合成的多壁碳纳米管（MWCNT）的光致发光（PL）。在低于240 K的温度下观察到了近红外区域的宽带PL发射。PL强度突然变化温度在240 K时升高，然后随着温度进一步升高而迅速淬灭且不可检测。 MWCNT的PL排放仅出现在温度上升的第一个周期中。但是，可以通过将样品暴露在富氧环境中进行回收。我们建议，MWCNTs的PL发射是由结合到MWCNTs表面的碳氧化氢样荧光团引起的。

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