PREPARATION OF WATER-SOLUBLE SiO2 COATING Sr2MgSi2O7:Eu2+ , Dy3+ FOR CELLS IMAGE
Authors:   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China, WANG Y. , WU M. ,   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China, LIU Y. ,   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China, PENG C. ,   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China, FAN J. ,   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China, SHEN Y ,   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China, LI F. ,   Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
Published: November 2022

In the present study, afterglow materials of SiO2 coating Sr2MgSi2O7: Eu2+ , Dy3+ (SiO2-PLNPs) of good water solubility were prepared by hydro-thermal co-precipitation method. Effects of SiO2 coating on the luminescence property, afterglow performance and water solubility of SiO2-PLNPs have been discussed by contrast with Sr2MgSi2O7: Eu2+ , Dy3+ (PLNPs) phosphor. The phase structure examined by X-ray diffraction (XRD) and both them was tetragonal Sr2MgSi2O7. From the excitation spectrum, they two can be excited by light with a wavelength of 275 nm and 355 nm. Subsequently emission peak was recorded at 470 nm. The afterglow decay curves of the PLNPs and SiO2-PLNPs showed that optical signal can be detected with a persistent time of 2 h. Micro structure of PLNPs and SiO2-PLNPs were characterized by scanning electron microscope (SEM) and transmission electron microscopy (TEM) which demonstrated the success for the surface coating. Suspension property test suggested SiO2-PLNPs have a good water solubility compared with PLNPs. The death rate of cells was less than 10 % when SiO2-PLNPs solution of different concentration treat mouse osteoblasts. Bright blue light spots were visible to the eye in the dark field when the above cells excited by a 470 nm excitation light.