In the spirit of the core–shell approach that made it possible to greatly enhance the photostability of semiconductor nanoparticles, we study the emission stability of single carbon nanotubes protected by a double shell of polymer that are emitting at telecommunication wavelengths. Two types of structures with different polymer layers have been studied at cryogenic temperatures, whereas nanotubes wrapped with poly(9,9-di-n-octylfluorenyl-2,7-diyl) and embedded in a bulk polystyrene matrix were used as a reference. A Mandel parameter description applied to the emission intensity and an Allan deviation analysis of the spectral diffusion show quantitatively that the polymer shells stabilize the emission of single carbon nanotubes by more than 1 order of magnitude in comparison with micelle wrapped nanotubes deposited on a SiO₂ surface. This represents an additional step toward the use of single-walled carbon nanotubes as quantum emitters at telecommunication wavelengths.

中文翻译：

---

单壁碳纳米管/聚合物核-壳杂化体作为电信波长发射器的光稳定性

本着“核-壳”方法的精神，它可以极大地增强半导体纳米颗粒的光稳定性，我们研究了在电信波长发射的聚合物双壳保护的单个碳纳米管的发射稳定性。在低温下研究了两种具有不同聚合物层的结构，而用聚（9,9-di- n（2-辛基芴基-2,7-二基）并嵌入块状聚苯乙烯基质中作为参考。应用于发射强度的Mandel参数描述和光谱扩散的Allan偏差分析表明，与沉积在SiO ₂表面上的胶束包裹的纳米管相比，聚合物壳将单个碳纳米管的发射稳定了1个数量级以上。。这代表了朝着将单壁碳纳米管用作电信波长的量子发射器的附加步骤。