Fabrication of a Nanophotonic Temperature Sensor Based on Upconversion Nano-emitters in Aqueous Medium
Paper ID : 1239-ICNS
Mahsa Habibi1, Esmaeil Heydari *2, Nahid Ghazyani1
1Faculty of Physics, Kharazmi University, Tehran, Iran
2Faculty of Physics, Kharazmi University, Tehran Iran
Recently, there has been a significant interest in applications of lanthanide upconversion nanoparticles. This rapid growth is due to their unique properties such as zero background emission, large anti-Stokes shift, several narrow band emissions, and long lifetime. In addition, these nanoparticles emit light that is in the optical window of tissues. Therefore, they are promising candidates for biological and biomedical applications. In this paper, a nanophotonic temperature sensor based on NaYF_4: Yb^(3+), Er^(3+) upconversion nano-emitters is implemented. In these nano-emitters, NaYF_4 is the host material in which lanthanide ions are doped. Yb ions provide a single excited state for collecting the excitation photons and acts as the sensitizer. Er ions are the activator ion. The upconversion nanoparticles are doped in polydimethylsiloxane to fabricate a nanocomposite film. The film is placed in a temperature-controlled water container and the photoluminescence spectrum of UCNPs is measured as the temperature changes. It is demonstrated these nanocomposite films can be used as a nanophotonic temperature sensor.
Lanthanide upconversion nanoparticles; Emission spectrum; polydimethylsiloxane; Nano-emitters
Status : Abstract Accepted (Poster Presentation)