Band-gap shift transition in the photoluminescence of single-walled carbon nanotubes
Band-gap shift transition in the photoluminescence of single-walled carbon nanotubes
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DOI：
10.1103/physrevlett.94.247401
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发表时间：
2005-06-24
影响因子：
8.6
通讯作者：
Lefebvre, J
中科院分区：
文献类型：
--
作者：
Finnie, P;Homma, Y;Lefebvre, J
悬浮在自由空间中的单壁碳纳米管的光致发光(PL)至少持续到425℃的高温，发现了一个新的转变，移动了光学带隙。这种转变是突然的，是滞后的，简单地依赖于PL发射能量，并受气体大气的影响。提出了一个模型来解释这种转变，将PL的变化与环境联系起来。
Photoluminescence (PL) from single-walled carbon nanotubes suspended in free space is shown to persist to high temperatures, at least to 425 degrees C. A new transition is identified, shifting the optical band gap. This transition is abrupt, is hysteretic, depends simply on the PL emission energy, and is affected by the gas atmosphere. A model is proposed to explain the transition, connecting changes in the PL to the environment.