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(A) FT-IR absorption spectra of a free D-glucuronic acid and three powder samples of D-glucuronic acid coated ultrasmall mixed lanthanide oxide nanoparticles. (B) TGA curves of three powder samples of D-glucuronic acid coated ultrasmall mixed lanthanide oxide nanoparticles. Inserted in (B) at the left bottom is a molecular structure of D-glucuronic acid used for surface coating of nanoparticles.
