表面等离子激元双增强β-NaYF4:Er^3+上转换研究  

Study on Co-enhancement of Upconversion of β-NaYF4∶Er^3+ by Surface Plasmon

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作  者:黄海 林林 黄莉莉 冯卓宏 郑标 王哲哲 郑志强 HUANG Hai;LIN Lin;HUANG Li-li;FENG Zhuo-hong;ZHENG Biao;WANG Zhe-zhe;ZHENG Zhi-qiang(Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,College of Physics and Energy,Fujian Normal University,Fuzhou 350117,China)

机构地区:[1]福建师范大学物理与能源学院福建省量子调控与新能源重点实验室,福州350117

出  处:《光子学报》2019年第2期190-197,共8页Acta Photonica Sinica

基  金:国家自然科学基金青年基金(Nos.11204039,51202033);福建省自然科学基金(Nos.2015J01243,2016J01213,2017J01399).

摘  要:用共沉淀法制备了β-NaYF4∶Er^3+纳米颗粒.通过化学还原法、晶种生长法分别制备银纳米立方颗粒及金纳米棒,并将其掺杂到β-NaYF4∶2%Er^3+纳米颗粒中形成复合体系,利用表面等离子激元增强效应分别实现β-NaYF4∶Er^3+上转换发光的激发和发射增强.当银纳米立方颗粒掺杂量为60μL时,上转换发光强度整体增强4.0倍;当金纳米棒掺杂量为60μL时,上转换发光强度整体增强7.8倍.在此基础上,将两种贵金属纳米颗粒同时掺杂到β-NaYF4∶Er^3+纳米颗粒材料中,实现了该材料上转换发光激发和发射双增强,上转换发光强度增强了16.0倍.β-NaYF4∶Er^3+ upconversion nanoparticles were prepared by using coprecipitation method.The Ag nanocubes prepared by chemical reduction method and the Au nanorods prepared by seed-mediated growth method were doped into β-NaYF4∶2%Er^3+ nanoparticles to form nano-composites,respectively.Therefore the enhancements of upconversion luminescence on β-NaYF4∶Er^3+ NPs were achieved through surface plasmon resonance.The enhancement was up to 4.0 times with 60 μL Ag nanocubes doped,while the enhancement was up to 7.8 times with 60 μL Au nanorods doped.Codoping Ag nanocubes and Au nanorods into β-NaYF4∶2%Er^3+ nanoparticles,great enhancement of upconversion luminescence reaching 16.0 times was obtained via co-enhancement of excitation and emission.

关 键 词:上转换 表面等离子激元增强 光谱 银纳米立方颗粒 金纳米棒 β-NaYF4∶Er^3+纳米颗粒 

分 类 号:O469[理学—凝聚态物理;理学—电子物理学;理学—物理]

 

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