Preparation, fluorescence spectroscopy, and AFM analysis of erbium oxide nanocolloid

Darayas Patel; Calvin Vance; Newton King; Malcolm Jessup; Sergey Sarkisov

doi:10.1117/12.806200

6 February 2009 Preparation, fluorescence spectroscopy, and AFM analysis of erbium oxide nanocolloid

Darayas Patel, Calvin Vance, Newton King, Malcolm Jessup, Sergey Sarkisov

Proceedings Volume 7212, Optical Components and Materials VI; 72121F (2009) https://doi.org/10.1117/12.806200
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

Nanocolloids of compounds containing fluorescent rare earth ions have recently attracted significant attention as agents for biolabeling, bioimaging, bio- and chemical sensing, and other applications. Erbium oxide nanocolloids have been prepared for the first time in water and gammabutyrolactone. Optical dynamic scatterometry and atomic force microscopy determined an average size (average mean height) of erbium oxide nanoparticles to be 10-11 nm. Prominent optical absorption peaks of the nanocolloids at 442.5 nm, 450.0 nm, 487.2 nm (strong), 492.0 nm, 523.0 nm (strong), 541.6 nm, 548.6 nm, 652.6 nm, and 665.7 nm (strong) can be attributed to erbium ions hosted within nanoparticles. Laser fluorescence spectroscopy of the nanocolloids was conducted using excitations with the lines of argon-ion laser (514 nm, 488 nm, 476 nm, and 458 nm) and 980-nm semiconductor laser. Strong green emission at 571 nm is more likely from transition between ⁴S_3/2 and ⁴I_15/2 levels and relatively weak red emissions from transition between ⁴I_9/2 and ⁴I_15/2 level of erbium was observed at excitation with visible laser radiation 488 nm and 476 nm. The reported nanocolloids thus showed to be good candidates for fluorescent biosensing applications and also as a new lasing filling medium in fiber lasers.

Citation Download Citation

Darayas Patel, Calvin Vance, Newton King, Malcolm Jessup, and Sergey Sarkisov "Preparation, fluorescence spectroscopy, and AFM analysis of erbium oxide nanocolloid", Proc. SPIE 7212, Optical Components and Materials VI, 72121F (6 February 2009); https://doi.org/10.1117/12.806200

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