Temperature dependence of metal-enhanced fluorescence of photosystem I from Thermosynechococcus elongatus.
作者： Imran Ashraf , Alexander Konrad , Heiko Lokstein , Sepideh Skandary , Michael Metzger
DOI: 10.1039/C6NR08762K
关键词: Photosystem I 、 Fluorescence 、 Thermosynechococcus elongatus 、 Mass spectrometry 、 Metal 、 Chemistry 、 Colloidal gold 、 Cryogenic temperature 、 Analytical chemistry 、 Emission spectrum
摘要: We report the temperature dependence of metal-enhanced fluorescence (MEF) individual photosystem I (PSI) complexes from Thermosynechococcus elongatus (T. elongatus) coupled to gold nanoparticles (AuNPs). A strong shape and intensity emission spectra is observed when PSI AuNPs. For each temperature, enhancement factor (EF) calculated by comparing AuNP-coupled mean ‘uncoupled’ PSI. At cryogenic (1.6 K) average EF was 4.3-fold. Upon increasing 250 K increases 84-fold. Single show even higher EFs up 441.0-fold. temperatures different spectral pools T. become distinguishable. These are affected differently plasmonic interactions enhancements. The remarkable increase explained a rate model including yield overlap between absorption AuNPs PSI, respectively.
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