ZnGa2O4 : Cr3+@Calcium Phosphate Nanocomposite with Near‐Infrared Persistent Luminescence and High Stability

Author:

Lee Clement1,Liu Yihong1,Hulme Benjamin1,Chang Lo‐Yeuh2,Ke Shang‐Wei2,Wang En‐Rui2,Wu Yu‐Hao2,Lin Bi‐Hsuan2,Jiang Yingying3,Liu Lijia1ORCID

Affiliation:

1. Department of Chemistry Western University 1151 Richmond Street London Ontario N6 A 5B7 Canada

2. National Synchrotron Radiation Research Centre 101 Hsin-Ann Road Hsinchu 30076 Taiwan

3. Institute of Translational Medicine Shanghai University Shanghai 200444 P.R. China

Abstract

AbstractPersistent luminescence (PersL) is an optical phenomenon which allows for materials to emit luminescence after ceasing excitation. The long‐lasting luminescence is ascribed to the presence of trap states, which can be exploited through the introduction of various dopants and post‐synthesis treatment. In this study, ZnGa2O4 : Cr3+ (CZGO), one of the most widely investigated near‐infrared‐emitting PersL materials, is synthesized in the form of nanoparticles, and incorporated into amorphous calcium phosphate (ACP) to form a luminescent nanocomposite with drug attachment potential. The effects of annealing CZGO in the composite are comparatively studied alongside the composite that contains unannealed CZGO. We find that ACP with annealed CZGO exhibits much higher luminescence intensity and longer PersL duration. The formation of the nanocomposite also results in the redistribution of Zn, and its influence on the composite luminescence intensity and the long‐term chemical stability are investigated.

Funder

Western University

Canadian Light Source

University of Saskatchewan

Publisher

Wiley

Subject

Organic Chemistry,Physical and Theoretical Chemistry,Analytical Chemistry

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