Light-Induced Incandescence of Single-Walled Carbon Nanotubes

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• 作者：Hualing Zeng ; Chunlei Yang ; Junfeng Dai ; Xiaodong Cui
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：March 20, 2008
• 年：2008
• 卷：112
• 期：11
• 页码：4172 - 4175
• 全文大小：166K
• 年卷期：v.112,no.11(March 20, 2008)
• ISSN：1932-7455

文摘

We report the light-induced incandescence of single-walled carbon nanotubes excited by weak visible andinfrared laser beams. The phenomenon does not occur on bulk graphite and amorphous carbon under thesame conditions. The intensity of the incandescence is exponentially proportional to the incident laser powerand the inverse of the gas pressure. After switching off the laser, the incandescence follows a simple exponentialdecay with a time constant of 160 s which is independent of the initial intensity. The temperature derivedfrom the blackbody radiation approximation agrees with the result from the Raman spectra. We attribute theincandescence of carbon nanotubes to the less thermal dissipation channels and low heat capacitance.