Your browser doesn't support javascript.
loading
Engineering single-molecule fluorescence with asymmetric nano-antennas.
Zhao, Wenqi; Tian, Xiaochaoran; Fang, Zhening; Xiao, Shiyi; Qiu, Meng; He, Qiong; Feng, Wei; Li, Fuyou; Zhang, Yuanbo; Zhou, Lei; Tan, Yan-Wen.
Afiliación
  • Zhao W; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
  • Tian X; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
  • Fang Z; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
  • Xiao S; Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, 200444, China.
  • Qiu M; Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai, 200444, China.
  • He Q; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
  • Feng W; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
  • Li F; Department of Chemistry and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China.
  • Zhang Y; Department of Chemistry and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China.
  • Zhou L; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
  • Tan YW; Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai, 200433, China.
Light Sci Appl ; 10(1): 79, 2021 Apr 14.
Article en En | MEDLINE | ID: mdl-33854033
As a powerful tool for studying molecular dynamics in bioscience, single-molecule fluorescence detection provides dynamical information buried in ensemble experiments. Fluorescence in the near-infrared (NIR) is particularly useful because it offers higher signal-to-noise ratio and increased penetration depth in tissue compared with visible fluorescence. The low quantum yield of most NIR fluorophores, however, makes the detection of single-molecule fluorescence difficult. Here, we use asymmetric plasmonic nano-antenna to enhance the fluorescence intensity of AIEE1000, a typical NIR dye, by a factor up to 405. The asymmetric nano-antenna achieve such an enhancement mainly by increasing the quantum yield (to ~80%) rather than the local field, which degrades the molecules' photostability. Our coupled-mode-theory analysis reveals that the enhancements stem from resonance-matching between antenna and molecule and, more importantly, from optimizing the coupling between the near- and far-field modes with designer asymmetric structures. Our work provides a universal scheme for engineering single-molecule fluorescence in the near-infrared regime.
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Light Sci Appl Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Light Sci Appl Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido