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Photonics
Heat transfer in a water drop containing a dye and nanoparticles under double laser irradiation
N. A. Myslitskayaa, R. Yu. Borkunovb, M. V. Tsarkovb, V. A. Slezhkina, I. G. Samusevb, Yu. N. Antipova, V. V. Bryukhanovb a Kaliningrad State Technical University
b Immanuel Kant Baltic Federal University, Kaliningrad
Abstract:
Heat transfer in a water drop containing eosine and ablation silver nanoparticles induced by stationary visible laser irradiation, $\lambda$ = 532 nm, and pulsed IR laser irradiation, $\lambda$ = 10.6 $\mu$m (VIS–IR double laser irradiation), has been studied in the temperature interval of 0.2 – 50$^\circ$C. It has been found that the vibratory system of triplet states in a dye molecule heats up after VIS–IR laser irradiation, causing thermoluminescence. The thermoluminescence decay kinetics indicates a new distribution of electron vibration modes in the fluorescence spectrum of dye molecules. If the drop with nanoparticles is small ($d<$ 1 mm), pulsed IR irradiation ($\tau$ = 50 ms) gives rise to a thermal front causing thermoluminescence, which travels in the drop with a velocity of 0.85 cm/s. Heat transfer in the drop during the formation of a thermal wave has been simulated.
Keywords:
double laser excitation, heat transfer, thermal conductivity, fluorescence, thermoluminescence, water drop, eosin, ablative silver nanoparticles.
Received: 08.07.2019 Revised: 31.01.2020 Accepted: 12.02.2020
Citation:
N. A. Myslitskaya, R. Yu. Borkunov, M. V. Tsarkov, V. A. Slezhkin, I. G. Samusev, Yu. N. Antipov, V. V. Bryukhanov, “Heat transfer in a water drop containing a dye and nanoparticles under double laser irradiation”, Zhurnal Tekhnicheskoi Fiziki, 90:8 (2020), 1323–1332; Tech. Phys., 65:8 (2020), 1272–1280
Linking options:
https://www.mathnet.ru/eng/jtf5234 https://www.mathnet.ru/eng/jtf/v90/i8/p1323
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Abstract page: | 64 | Full-text PDF : | 26 |
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