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1. 桂林理工大学 材料科学与工程学院, 广西有色金属及特色材料加工重点实验室,广西 桂林,541004
2. 桂林理工大学 环境科学与工程院,广西 桂林,541004
3. 桂林医学院,广西 桂林,541004
纸质出版日期:2015-11-10,
收稿日期:2015-7-16,
修回日期:2015-8-19,
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徐涛, 欧俊, 郑伟华等. &beta;-NaYF<sub>4</sub>:Yb,Er/Tm/Ho上转换纳米晶的制备及其水溶性研究[J]. 发光学报, 2015,36(11): 1266-1270
XU Tao, OU Jun, ZHENG Wei-hua etc. Preparation and Water Solubility of NaYF<sub>4</sub>: Yb,Er/Tm/Ho Up-conversion Nanoparticles[J]. Chinese Journal of Luminescence, 2015,36(11): 1266-1270
徐涛, 欧俊, 郑伟华等. &beta;-NaYF<sub>4</sub>:Yb,Er/Tm/Ho上转换纳米晶的制备及其水溶性研究[J]. 发光学报, 2015,36(11): 1266-1270 DOI: 10.3788/fgxb20153611.1266.
XU Tao, OU Jun, ZHENG Wei-hua etc. Preparation and Water Solubility of NaYF<sub>4</sub>: Yb,Er/Tm/Ho Up-conversion Nanoparticles[J]. Chinese Journal of Luminescence, 2015,36(11): 1266-1270 DOI: 10.3788/fgxb20153611.1266.
利用低温成核和高温生长的原理
选用蓖麻油酸(RA)为表面活性剂
合成了上转换纳米晶-NaYF
4
:Yb
Er/Tm/Ho.结果表明
-NaYF
4
:Yb
Er/Tm/Ho纳米晶的粒径约为45 nm
晶相为纯六方相.在980 nm激发下
-NaYF
4
:Yb
Er/Tm/Ho纳米晶呈现较强的上转换发光.通过将其溶解在二氯甲烷和水的混合溶液中可知
RA-NaYF
4
纳米晶只能分散在水中且在暗场下形成明亮的绿光
而二氯甲烷中没有
证明其具有良好的水中分散性
并且在酸性和碱性条件下
其荧光性能稳定.
Hexagonal-phase NaYF
4
:Yb
Er/Ho/Tm up-conversion nanocrystals were synthesized using ricinoleic acid (RA) as an sufficient and user-friendly surfactant. The strategy is to form small solid-state crystal nuclei at a lower temperature and then make the nuclei further grow and ripen at a higher temperature. The experiment results show that the structure of NaYF
4
:Yb
Er/Ho/Tm nanocrystal is hexagonal-phase with the diameter of 45 nm. The nanocrystals show strong luminescence under the excitation of a 980 nm laser with the average power about 1 W. When the nanocrystals are dispersed in the mixed solution of water and dichloromethane
we can only see a strong green bright beam in water
which demonstrates the hydrophilic characteristic of RA-NaYF
4
nanocrystals. The fluorescence property of NaYF
4
:Yb
Er/Ho/Tm nanocrystals has no significant change in acidic medium or alkaline.
上转换纳米材料荧光水溶性稳定性
up-conversion nanoparticlesfluorescencewater-solubilitystability
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