NGUYEN, Nhat Nam. ENGINEERING THE NaYF4:Yb3+/Tm3+ UPCONVERSION NANOPARTICLE LUMINESCENCE ENERGY TRANSFER FOR A RATIOMETRIC pH INDICATOR. Dalat University Journal of Science, Dalat, Vietnam, v. 13, n. 1, p. 71–82, 2022. DOI: 10.37569/DalatUniversity.13.1.1044(2023). Disponível em: https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1044.. Acesso em: 16 nov. 2025.