Abstract
A simple and effective method has been developed for synthesizing multihydroxy NaYF4:Yb/Er upconversion nanoparticle (UCNP) using natural peach gum (PG) via hydrothermal synthesis. Initially, PG binds to metal ions, followed by pyrolysis to form water-soluble PG polysaccharide (PGP) ligands that coat the surface of the UCNP. This coating imparts hydrophilicity and introduces numerous hydroxyl groups to the UCNP. The resulting UCNP, with diameters ranging from 100 to 200 nm, exhibit a mixed cubic-hexagonal crystalline structure and demonstrate good upconversion luminescence and low toxicity. Additionally, the surface hydroxyl groups facilitate conjugation with functional molecules, enhancing the potential for post-modification. This green, simple, and efficient approach offers a promising pathway for producing UCNP, opening new possibilities for various applications.
Published Version
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