Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam Campus, Anantapur, Andhra Pradesh, India 515134.
ACS Appl Mater Interfaces. 2016 May 18;8(19):12324-9. doi: 10.1021/acsami.5b12038. Epub 2016 May 4.
We demonstrate for the first time the use of Fe-based nanoparticles on N-doped graphene as spacer and cavity materials and study their plasmonic effect on the spontaneous emission of a radiating dipole. Fe-C-MF was produced by pyrolizing FeOOH and melamine formaldehyde precursor on graphene, while Fe-C-PH was produced by pyrolizing the Fe-phenanthroline complex on graphene. The use of the Fe-C-MF composite consisting of Fe-rich crystalline phases supported on N-doped graphene presented a spacer material with 116-fold fluorescence enhancements. On the other hand, the Fe-C-PH/Ag based cavity resulted in an 82-fold enhancement in Surface Plasmon-Coupled Emission (SPCE), with high directionality and polarization of Rhodamine 6G (Rh6G) emission owing to Casimir and Purcell effects. The use of a mobile phone as a cost-effective fluorescence detection device in the present work opens up a flexible perspective for the study of different nanomaterials as tunable substrates in cavity mode and spacer applications.
我们首次展示了在 N 掺杂石墨烯上使用基于 Fe 的纳米粒子作为间隔物和腔材料，并研究了它们对辐射偶极子自发发射的等离子体效应。通过在石墨烯上热解 FeOOH 和三聚氰胺甲醛前体制备了 Fe-C-MF，而通过在石墨烯上热解 Fe-菲咯啉配合物制备了 Fe-C-PH。由负载在 N 掺杂石墨烯上的富 Fe 晶相组成的 Fe-C-MF 复合材料表现出具有 116 倍荧光增强的间隔材料。另一方面，基于 Fe-C-PH/Ag 的腔导致 Rhodamine 6G（Rh6G）发射的表面等离子体耦合发射（SPCE）增强了 82 倍，由于 Casimir 和 Purcell 效应，具有 Rh6G 发射的高方向性和偏振性。在本工作中，使用手机作为具有成本效益的荧光检测设备，为不同纳米材料作为可调谐腔模式和间隔应用的基底的研究开辟了一个灵活的视角。
