Hybrid structures consisting of emitting carbon nanodots bound to the surface of monodisperse spherical silica particles, which function as microresonators, are synthesized. The carbon nanodots are deposited onto the particle surface through controllable coagulation in three different solvents: ammonia, hydrochloric acid, and glycerol. In photoluminescence spectra of hybrid structures, throughout the entire range of carbon nanodot emission, which extends from UV to near IR, we observe the presence of intensive narrow bands related to emission of the nanodots in the whispering gallery modes of a spherical microresonator. All the observed bands are identified by comparing the spectral positions of whispering gallery modes calculated using the transfer matrix method for spherical waves to the experimental data.

中文翻译：

---

球形微谐振器表面结合的碳纳米点的发光特性

合成了由结合到单分散球形二氧化硅颗粒表面的碳纳米点组成的杂化结构，该杂化结构起微谐振器的作用。碳纳米点通过在三种不同的溶剂：氨，盐酸和甘油中的可控凝结而沉积在颗粒表面上。在混合结构的光致发光光谱中，在碳纳米点发射的整个范围内（从UV延伸到近红外），我们观察到球形微谐振器的回音壁模式下存在与纳米点发射相关的密集窄带。通过将使用球面波传输矩阵方法计算的耳语画廊模式的光谱位置与实验数据进行比较，可以识别所有观察到的波段。