Red Zn2SiO4:Eu3+ and Mg2TiO4:Mn4+ nanophosphors for on-site rapid optical detections: Synthesis and characterization.
Appl Phys A Mater Sci Process
; 127(8): 588, 2021.
Article
em En
| MEDLINE
| ID: mdl-34276141
ABSTRACT
This study reports the synthesis and characterization of the red nanophosphors Zn2SiO4Eu3+ (ZSOEu3+) and Mg2TiO4Mn4+ (MTOMn4+). The use of phosphors as a fluorescence label for lateral flow immunochromatographic assay (LFIA) has also been described. The optimal photoluminescence (PL) for ZSOEu3+ was obtained when it was synthesized with 7 mol% of Eu3+ and annealed at 1100 °C for 1 h. Long fluorescence lifetime (1.01 ms), high activation energy E a (0.28 eV), and low PL degeneration (10% at 110 °C) are the characteristics of ZSOEu3+. MTOMn4+ also exhibited high PL intensity along with a high E a of 0.32 eV. The emission wavelengths of phosphors are biocompatible with the optical bio-window of tissues. When human immunoglobulin G (human IgG) at a constant concentration of 100 µg/mL was used for detection, the PL ratios of the test line to the control line were 2.15 and 2.28 for the ZSOEu3+- and MTOMn4+-labeled LFIA, respectively. Thus, the ZSOEu3+ and MTOMn4+ nanophosphors are capable of human IgG recognition and are the promising candidates as fluorescent labels for on-site rapid optical biodetection. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s00339-021-04733-0.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Appl Phys A Mater Sci Process
Ano de publicação:
2021
Tipo de documento:
Article