核壳结构NaYF4: Yb3+、Er3+ / SiO2颗粒的制备及其光谱性能

doi:10.3724/SP.J.1077.2010.01128

无机材料学报 ›› 2010, Vol. 25 ›› Issue (11): 1128-1132.DOI: 10.3724/SP.J.1077.2010.01128 CSTR: 32189.14.SP.J.1077.2010.01128

核壳结构NaYF₄: Yb³⁺、Er³⁺ / SiO₂颗粒的制备及其光谱性能

陈实, 周国红, 张海龙, 杨燕, 王士维

(中国科学院上海硅酸盐研究所, 上海 200050)

收稿日期:2010-02-24 修回日期:2010-05-11 出版日期:2010-11-20 网络出版日期:2010-11-01
基金资助:
国家自然科学基金(50902146); 中国博士后科学基金(20090450741)

Synthesis and Optical Properties of Core Shell NaYF₄: Yb³⁺, Er³⁺ / SiO₂ Particles

CHEN Shi, ZHOU Guo-Hong, ZHANG Hai-Long, YANG Yan, WANG Shi-Wei

(Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2010-02-24 Revised:2010-05-11 Published:2010-11-20 Online:2010-11-01
Supported by:
National Nature Science Foundation of China(50902146); Science Foundation for Post Doctorate Research of China (20090450741)

摘要/Abstract

摘要： 以正硅酸乙酯为原料, 采用水解法, 对100 nm亲水及20 nm亲油的NaYF₄:Yb³⁺、Er³⁺上转换发光纳米颗粒进行了表面修饰, 制备出了NaYF₄: Yb³⁺、Er³⁺ / SiO₂核壳结构. 研究了反应时间、反应前驱体浓度等工艺条件对包覆效果的影响. 结果表明, 经过二氧化硅包覆后的亲水及亲油大、小颗粒都可以均匀地分散在亲水溶剂中. 在室温下, 分别对SiO₂壳层包覆前后的NaYF₄: Yb³⁺、Er³⁺纳米颗粒的上转换发光光谱进行对比研究, 发现两种粒子都能在980 nm激光激发下, 产生550 nm的绿光及670 nm的红光, 且包覆后纳米颗粒的发光位置及整体发光强度与包覆前相比没有受到影响.

关键词: 核壳结构, 上转换发光, 微乳液

Abstract: High quality NaYF₄: Yb³⁺, Er³⁺ / SiO₂ core-shell structures with different sizes were prepared by coating silica shell onto 100 nm size hydrophilic and 20 nm size hydrophobic up-conversion nano particles through hydrolysis of TEOS using ethanol and cyclohexane as main solvent respectively. Effects of reaction time and precursor concentration on the synthesis of core-shell structure were studied. The results show that the core shell structure could be easily dispersed in polar solvent with uniform silica coating on hydrophobic and hydrophilic, big and small NaYF₄: Yb³⁺, Er³⁺ nano particles. Up-conversion spectrum characterizations of the nano structure were conducted under room temperature. There were no changes of the emission intensity and emission center for particles before or after silica coating. Green light around 550 nm and red light around 670 nm could be observed with 980 nm laser excitation.

Key words: core-shell structure, up-conversion luminescence, microemulsion

中图分类号:

TQ174

陈实, 周国红, 张海龙, 杨燕, 王士维. 核壳结构NaYF₄: Yb³⁺、Er³⁺ / SiO₂颗粒的制备及其光谱性能[J]. 无机材料学报, 2010, 25(11): 1128-1132.

CHEN Shi, ZHOU Guo-Hong, ZHANG Hai-Long, YANG Yan, WANG Shi-Wei. Synthesis and Optical Properties of Core Shell NaYF₄: Yb³⁺, Er³⁺ / SiO₂ Particles[J]. Journal of Inorganic Materials, 2010, 25(11): 1128-1132.

参考文献

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核壳结构NaYF₄: Yb³⁺、Er³⁺ / SiO₂颗粒的制备及其光谱性能

Synthesis and Optical Properties of Core Shell NaYF₄: Yb³⁺, Er³⁺ / SiO₂ Particles

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