Abstract
Au nanoparticle (Au NP)@SiO2@TDA-Eu nanocomposites were prepared by a two-step process: Au NP@SiO2 nanocomposites were prepared by a modified onepot process. Then the europium coordination polymer was deposited on the surface of the Au NP@SiO2 by mixing 2,2’-thiodiacetic acid [S(CH2COO)22-, TDA] and Eu(NO3)3·6H2O in ethanol via a hydrothermal method. The maximum fluorescent enhancement factor of the nanocomposites was 6.81 at 30 nm thickness of silica between the core of the Au NP and the shell of TDA-Eu. The prepared nanocomposites exhibit more sensitive monitoring of reactive oxygen species.
摘要
本论文通过两步工艺成功合成了Au NP@SiO2@TDA-Eu复合纳米材料:采用改进的一锅法制备了纳米复合材料Au NP@SiO2,然后 利用水热法, 在无水乙醇中通过亚硫基二乙酸[S(CH2COO)22-, TDA]和EUNO3)3·6H2O反应, 生成铕的配位聚合物, 并将其沉积在Au NP@SiO2的表面合成复合纳米材料Au NP@SiO2@TDA-Eu.该复合材料在二氧化硅层厚度为30 nm时, 荧光增强最大, 增强因子为6.81,在 对活性氧的检测中,表现出高灵敏度.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (51702006 and 21501141), the Doctoral research project (ZK2017027) of Baoji University of Arts and Sciences, and the Education Commission of Shaanxi Province (2015JQ6223, 12JS114, 14JS092 and 17JS009).
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Huiqin Li received her BSc degree from Shaanxi University of Science and Technology and PhD degree from Northwestern University. Now, she is a lecturer at Baoji University of Arts and Sciences. Her research interest focuses on the functional nanomaterials and luminescent materials.
Jianhui Yang received PhD degree from Changchun Institute of Applied Chemistry, Chinese Academy of Sciences in 2008. Then, he had his post-doc experience from the City University of New York, University of Florida, the University of Texas at San Antonio and the University of Paris. Currently, he is an associate professor at Northwestern University. His research interests include controllable synthesis, assembly and properties of nanomaterials.
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Au nanoparticle@silica@europium coordination polymer nanocomposites for enhanced fluorescence and more sensitive monitoring reactive oxygen species
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Li, H., Yang, J., Deng, Q. et al. Au nanoparticle@silica@europium coordination polymer nanocomposites for enhanced fluorescence and more sensitive monitoring reactive oxygen species. Sci. China Mater. 61, 401–408 (2018). https://doi.org/10.1007/s40843-017-9127-0
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DOI: https://doi.org/10.1007/s40843-017-9127-0