DEPENDENCE OF GD-DOPED ZNO SURFACES FLUORESCENT PROPERTIES ON DOPANT CONCENTRATION

1 SHULGA Aleksandra
Co-authors:
1,2 BUTUSOV Leonid 2,3,4 NAGOVITSYN Ilia 2,3 CHUDINOVA Galina 1 HAYRULLINA Indira 1 KURILKIN Vladimir 1 KOCHNEVA Margarita
Institutions:
1 RUDN University - Peoples’ Friendship University of Russia, Moscow, Russian Federation
2 Natural Science Center of General Physics Institute RAS, Russian Federation
3 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Russian Federation
4 Semenov Institute of Chemical Physics RAS, Moscow, Russian Federation
Conference:
9th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 18th - 20th 2017
Proceedings:
Proceedings 9th International Conference on Nanomaterials - Research & Application
Pages:
152-156
ISBN:
978-80-87294-81-9
ISSN:
2694-930X
Published:
8th March 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
40 views / 15 downloads
Abstract

Substrates containing zinc oxide and different amounts of gadolinium on the surface of the zinc oxide nano particles for biosensorics were obtained for the first time by the standard sol-gel technique. This is a new material has not yet been extensively studied.In this paper, we present the results of the photoluminescent response of the zinc oxide surface when it is modified by various amounts of gadolinium during the classical sol-gel method of the surface obtaining. Aspects of creating a modified surface of zinc oxide are highlighted. The used concentrations of gadolinium vary from 1 to 33% caused both quenching and ignition of photoluminescence at the wavelength of 356 nm upon excitation into the absorption band of protein 280 nm. The photoluminescence intensity of zinc oxide without doping is 40 relative value units, the addition of 8% Gd increases the photoluminescence by 7 times (280 r.u.), the addition of 31% Gd decreases the photoluminescence by 40 times compared to undoped zinc oxide. The resulting possibility of increased luminescence when the doping of the films with gadolinium willing, apparently, to increase the ratio “signal/background”, and therefore increase the sensitivity of the biosensor with fluorescent registration.

Keywords: Optical biosensors, new materials, zinc oxide substrates, gadolinium, immobilization, photoluminescence, photoluminescence quenching, photoluminescence ignition
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