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Issue 15, 2019
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The influence of dopant concentration and grain size on the ability for temperature sensing using nanocrystalline MgAl2O4:Co2+,Nd3+ luminescent thermometers

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Abstract

In this work, for the first time, the ability of nanocrystalline MgAl2O4:Co2+ and MgAl2O4:Co2+,Nd3+ phosphors for temperature sensing was investigated in a wide temperature range. It has been proved that the emission intensity of Co2+ can be modulated either by its concentration or by the size of nanocrystals. The highest relative sensitivity was obtained for MgAl2O4:0.01% Co2+,5% Nd3+ annealed at 1100 °C (about 0.3% °C−1). The provided analysis reveals that Co2+ and Nd3+ are located in tetrahedral sites of Mg2+ ions. The presented results show that Co2+ luminescence depends on temperature changes of its environment, and it is found that nanothermometers doped with Co2+ could be a potential temperature sensors in luminescent thermometry.

Graphical abstract: The influence of dopant concentration and grain size on the ability for temperature sensing using nanocrystalline MgAl2O4:Co2+,Nd3+ luminescent thermometers

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Supplementary files

Article information


Submitted
22 Jan 2019
Accepted
12 Mar 2019
First published
13 Mar 2019

New J. Chem., 2019,43, 6080-6086
Article type
Paper

The influence of dopant concentration and grain size on the ability for temperature sensing using nanocrystalline MgAl2O4:Co2+,Nd3+ luminescent thermometers

A. Kobylinska, K. Kniec, K. Maciejewska and L. Marciniak, New J. Chem., 2019, 43, 6080
DOI: 10.1039/C9NJ00368A

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