Molten?Salt?Assisted Annealing for Making Colloidal ZnGa <sub>2</sub> O <sub>4</sub> :Cr Nanocrystals with High Persistent Luminescence
نویسندگان
چکیده
Persistent luminescent nanocrystals (PLNCs) in the sub-10 nm domain are considered to be most fascinating inventions lighting technology owing their excellent performance anti-counterfeiting, luminous paints, bioimaging, security applications, etc. Further improvement of persistent luminescence (PersL) intensity and lifetime is needed achieve desired success PLNCs while keeping uniform size. In this work, concept molten salt confinement thermally anneal as-synthesized ZnGa2O4:Cr3+ (ZGOC) colloidal NCs (CNCs) a medium at 650 °C introduced. This method led significantly monodispersed few agglomerated with much improved photoluminescence (PL) PersL without growth size pristine CNCs. Other strategies such as i) thermal annealing, ii) overcoating, iii) core–shell strategy have also been tried improve PL but did not them simultaneously. Moreover, directly annealing CNCs air assistance could both particle heterogeneity aggregation, which highly unsuitable for vivo imaging. We believe work provides novel design high long duration losing nanostructural characteristics, water dispersibility biocompatibility.
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ژورنال
عنوان ژورنال: Chemistry: A European Journal
سال: 2021
ISSN: ['0947-6539', '1521-3765']
DOI: https://doi.org/10.1002/chem.202101234