Abstract
In this manuscript, we have reported pro-oxidant activity of GdOF nanostructures under dark condition which primarily depends on morphology and defect structure. As examined from FTIR, Raman, and photoluminescence spectroscopy, defects are found to be neutral oxygen (\({\mathrm{V}}_{\mathrm{O}}\)) and singly charged oxygen (\({\mathrm{V}}_{\mathrm{O}}^{+}\)) vacancies. In order to check stability of GdOF, we have calculated vibration band structure, while electronic band structure has been calculated to get insight about band-to-band electronic transition and other electronic phenomena, specifically in determining pro-oxidant activity. Herein, our calculation confirms spin-polarized conduction band originating from Gd 5p states and spin-polarized valance band which consists of O 2p orbitals. Our calculation underestimates experimental band gap, but corroborates previously studied magnetic property of GdOF. As previous studies highlight GdOF as MRI and fluorescent contrast agent, thus present investigation on pro-oxidant activity of GdOF widens its scope in photodynamic therapy indicating its theranostic capability.
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One of the authors (TM) thanks CSIR, Govt. of India, while other (NH) thanks UGC, Govt. of India, for financial support during execution of their work. TM and NH have equal contribution to this manuscript.
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Mondal, T., Haldar, N., Mondal, D. et al. Oxygen vacancy in GdOF: generation of reactive oxygen species under dark. Appl. Phys. A 128, 698 (2022). https://doi.org/10.1007/s00339-022-05825-1
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DOI: https://doi.org/10.1007/s00339-022-05825-1