Morphological evolution of upconversion nanoparticles and their biomedical signal generation.

ABSTRACT: Advancements in the fabrication of upconversion nanoparticles (UCNPs) for synthetic control can enable a broad range of applications in biomedical systems. Herein, we experimentally verified the role of the hydrothermal reaction (HR) time in the synthesis of NaYF₄:20%Yb³⁺/3%Er³⁺ UCNPs on their morphological evolution and phase transformation at different temperatures. Characterizations of the as-prepared UCNPs were conducted using X-ray diffraction (XRD), electron microscopy and spectroscopy, and thermogravimetric and upconversion (UC) luminescence analysis. We demonstrated that determining the optimal HR time, also referred to here as the threshold time, can produce particles with good homogeneity, hexagonal phase, and UC luminescence efficiency. Subsequen

SUBMITTER: Rafique R 

PROVIDER: S-EPMC6244231 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature