TheScientificWorld Journal 2013-01-01

Fluorescence ratiometric properties induced by nanoparticle plasmonics and nanoscale dye dynamics.

Aron Hakonen

文献索引：ScientificWorldJournal 2013 , 624505, (2013)

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摘要

Nanoscale transport of merocyanine 540 within/near the plasmon field of gold nanoparticles was recognized as an effective inducer of single-excitation dual-emission ratiometric properties. With a high concentration of the signal transducer (ammonium), a 700% increase in fluorescence was observed at the new red-shifted emission maximum, compared to a nanoparticle free sensor membrane. A previously nonrecognized isosbestic point is demonstrated at 581.4 ± 0.1 nm. The mechanism can be utilized for enhanced and simplified ratiometric optical chemical sensors and potentially for thin film engineering to make solar cells more effective and stable by a broader and more regulated absorption.