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Tuning the Dual Emission of Photon‐Upconverting Nanoparticles for Ratiometric Multiplexed Encoding
Author(s) -
Gorris Hans H.,
Ali Reham,
Saleh Sayed M.,
Wolfbeis Otto S.
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201004697
Subject(s) - materials science , nanoparticle , optoelectronics , photon , multiplexing , luminescence , encoding (memory) , nanotechnology , optics , physics , computer science , telecommunications , artificial intelligence
Ratiometric encoding with two types of photon‐upconverting nanoparticles is demonstrated. Different concentrations of filter dyes on the nanoparticle’s surface are used to tune selectively one of the dual emission bands ( I code ). The second emission band ( I ref ), by contrast, serves as an internal reference to obtain ratiometric codes. Combining UCNPs with distinct emission bands expands the coding capacity exponentially.