Internal temperature sensing in lentil root seedlings with Er, Yb: NaYF4 up-converting nanoparticles assisted with smartphone by using and RGB luminiscent nanothermometric model

Identifier:  TFM:749

Handle: https://hdl.handle.net/20.500.11797/TFM749

Authors:  Figueras Llussà, Paulí

Abstract:
Lentil root plants were grown in a controlled environment and watered with a colloidal dispersion of 0.5 μg/mL Er,Yb:NaYF4 nanoparticles in water. The Er3+ up-conversion luminescence emission bands from this type of nanoparticles at 520 nm (2H11/2  4I15/2), 545 nm (4S3/2  4I15/2) and 650 nm (4F9/2  4I15/2) after excitation of Yb3+ at 980 nm and the subsequent energy transfer to Er3+, show good properties for luminescence nanothermometry purposes to sense temperature values in the internal parts of a lentil root plant from outside. The objective of using this luminescent nanothermometer as a tool in the field of crop temperature control, requires the simplification of experimental set-ups. For this reason here is proposed to use smartphone cameras as detectors with the application of an RGB approach for analytical treatment. The results obtained show the ability of Er,Yb:NaYF4 up-conversion nanoparticles to be used as luminescent nanothermometers for temperature sensing inside the lentil plant root structure, which indicates the statement that plants have a regulative thermal mechanism against extreme temperatures, and presents the smartphone camera as a detector for the emitted luminescence.