光致发光
费斯特共振能量转移
接受者
材料科学
米氏散射
纳米颗粒
共振感应耦合
共振(粒子物理)
分子
分子物理学
光电子学
纳米技术
荧光
原子物理学
化学
能量转移
光学
物理
凝聚态物理
有机化学
光散射
散射
作者
Keisuke Ozawa,Masato Adachi,Hiroshi Sugimoto,Minoru Fujii
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2024-01-01
摘要
Optically resonant nanoparticles decorated with donor-acceptor molecular pairs have been attracting attention for applications as nanoprobes in bioimaging and biosensing. We produced composite nanoparticles composed of donor-acceptor molecular pairs and silicon nanospheres (Si NSs) with diameters of 100-200 nm exhibiting Mie resonances in the visible range and studied the effect of Mie resonances on their photoluminescence properties. We showed that the photoluminescence spectra are strongly modified by Mie resonances and the spectral shape is controlled in a wide range by the Si NS size; by controlling the size, we can achieve the photoluminescence maximum from that of a donor molecule to that of an acceptor molecule almost continuously. From the photoluminescence decay properties in combination with theoretical calculations, we showed that the observed strong modification of the spectral shape is mainly due to the Purcell effect on donor and acceptor molecules, and the effect of Mie resonances on the Förster resonance energy transfer (FRET) rate is relatively small. We also showed that because of the large Purcell effect and the small FRET rate enhancement, Mie resonances decrease the FRET efficiency.
科研通智能强力驱动
Strongly Powered by AbleSci AI