Work

Sub-10 nm Yb 3+ /Er 3+ -doped NaYF 4 core–shell upconversion nanoparticles: precise size control and enhanced luminescence

Year: 2025

Type: article

Abstract: structures with enhanced crystallinity were confirmed by sharper, more intense XRD peaks under optimized conditions. Morphological transitions from small spherical nanoparticles (9.75 nm) to larger anisotropic structures (13.3-19.1 nm) were accompanied by tunable emission and controllable red-to-green (R/G) emission ratios. Power-dependent analyses further confirmed the effectiveness of two-photon upconversion mechanisms, providing insights into the underlying energy transfer dynamics involved. Remarkably, compared to the conventional method, the optimized protocol reduced reaction duration by 50%, consistently yielding highly uniform and crystalline UCNPs with significantly improved upconversion efficiency. These findings underscore the critical role of synthesis temperature and reaction duration in precisely tailoring UCNP properties for advanced bioimaging and photonic applications.

Source: RSC Advances

DOI: 10.1039/d5ra02389k

Authors: Umme Farva, Young Gwon Jung, Kang Taek Lee

Institution: Gwangju Institute of Science and Technology

Language: English

Topic: Luminescence Properties of Advanced Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,042

Funders: National Research Foundation, National Research Foundation of Korea, Ministry of Science and ICT, South Korea