Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (1): 61.

• Letters • Previous Articles     Next Articles

Observation of Surface Plasmon-coupled Directional Fluorescence Using Thin Iron Films

CAO Shuo-Hui, XIE Tang-Tang, CAI Wei-Peng, LI Yao-Qun*   

  1. Department of Chemistry and Key Laboratory of Analytical Sciences College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
  • Received:2009-10-15 Online:2010-01-10 Published:2010-01-10
  • Contact: LI Yao-Qun. E-mail: yqlig@xmu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20975084, 20575055)和国家“九七三”计划项目(批准号: 2007CB935600)资助.

Abstract:

The observation of surface plasmon-coupled directional fluorescence(SPCDF) on thin iron films was presented. SPCDF from thin iron films was p-polarized with a directional emission angle of 70°. Fluorescein and meso-tetra(4-sulfonatophenyl)porphine(TPPS) were used as a model system of dual fluorophores. Using 25 nm thin iron films, the SPCDF signals of the two fluorophores were observed at a fixed angle just by one scan. The SPCDF signals of Fluorescein and TPPS added to whole blood were identified clearly, eliminating the background interference of blood effectively. Thin iron films have been proven to be new materials for SPCDF detection, promoting a new mode to observe the enhanced fluorescence signals of different fluorophores by one scan. They should be useful for tracking the labled systems of multi-fluorophores in biological applications.

Key words: Surface plasmon-coupled directional fluorescence(SPCDF); Thin iron film; Directional emission angle; Dual fluorophore

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