应用化学2025，Vol.42Issue(3)：365-374,10.DOI:10.19894/j.issn.1000-0518.240271
单颗粒上转换荧光光谱性质调控
Research on the Regulation of Upconversion Fluorescence Spectral Properties on Single Particles
摘要
Abstract
Lanthanide-doped upconversion(UC)micro/nanocrystals have demonstrated significant application prospects in fields such as display,sensing,bioimaging,and drug delivery due to their excellent optical properties.Despite remarkable progress in upconversion luminescence research,the challenge of achieving color control at the single-particle level remains unsolved.This study proposes a strategy for transforming NaYF4 single-particle crystals into Y2O3 crystals through in-situ heat treatment.By in-situ ion exchange,Y2O3 crystals grown in-situ were successfully obtained and their fluorescence,morphology,structure,and size were characterized.The study found that the in-situ grown Y2O3 microrods retained the same size and morphology as NaYF4.The results of elemental distribution analysis and high-resolution transmission electron microscopy(TEM)further confirm the successful preparation of Y2O3∶Er3+/Yb3+.As the excitation power increases,the red-to-green intensity ratio(R/G)of Er3+in the NaYF4 host material gradually decreases from 4.5 to 3.42,while in the Y2O3 host material,this ratio significantly drops from 0.84 to 0.48.This demonstrates that through in-situ phase transformation of the crystals,real-time modulation of the upconversion red light of Er3+in NaYF4 towards bright upconversion green light in Y2O3 can be achieved.This research not only expands the research methods for rare-earth luminescent crystals at the single-particle level but also holds promise for the application of their multicolor fluorescence properties at the single-particle level in areas such as sophisticated anti-counterfeiting and multicolor imaging.关键词
稀土微米颗粒/可调节荧光发射/晶体结构转变/单颗粒Key words
Rare-earth microparticles/Tunable fluorescence emission/Crystal structure transformation/Single-particle分类
化学引用本文复制引用
李云扬,郑睿哲,周延,海热古·吐逊,董彪..单颗粒上转换荧光光谱性质调控[J].应用化学,2025,42(3):365-374,10.基金项目
维吾尔自治区自然科学基金"青年科学基金"(No.2022D01C727)、省部共建中亚高发病成因与防治国家重点实验室"面上"项目(No.SKL-HIDCA-2023-15)和新疆维吾尔自治区天池英才"青年基金"(No.0301050903)资助 Supported by the Natural Science Foundation of Xinjiang Uygur Autonomous Region(No.2022D01C727),the State Key Laboratory of Pathogenesis Prevention and Treatment of High Incidence Disease and Central Asia,Xinjiang Medical University(No.SKL-HIDCA-2023-15)and the Talent Project of Tianchi Doctoral Program in Xinjiang Uygur Autonomous Region(No.0301050903) （No.2022D01C727）
