Coupling of Ag Nanoparticle with Inverse Opal Photonic Crystals as a Novel Strategy for Upconversion Emission Enhancement of NaYF4: Yb(3+), Er(3+) Nanoparticles.
Coupling of Ag Nanoparticle with Inverse Opal Photonic Crystals as a Novel Strategy for Upconversion Emission Enhancement of NaYF4: Yb(3+), Er(3+) Nanoparticles.
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DOI：
10.1021/acsami.5b06817
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发表时间：
2015-11
影响因子：
9.5
通讯作者：
Bo Shao;Zhengwen Yang;Yida Wang;Jun Yu Li;Jianzhi Yang;J. Qiu;Zhiguo Song
中科院分区：
文献类型：
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作者：
Bo Shao;Zhengwen Yang;Yida Wang;Jun Yu Li;Jianzhi Yang;J. Qiu;Zhiguo Song
稀土离子掺杂上转换（UC）纳米粒子因其在太阳能电池、生物标记、治疗和成像方面的潜在应用而引起了人们极大的兴趣。然而，UC纳米粒子的应用仍然受到其低发射效率的限制。光子晶体和贵金属纳米颗粒被广泛应用于增强稀土离子的超导发射。本工作采用模板辅助方法制备了一种由反蛋白石光子晶体和Ag纳米粒子组成的新型基底，用于增强NaYF4:Yb(3+)、Er(3+)纳米粒子的UC发射。由于光子带隙的布拉格反射，NaYF4:Yb(3+)、Er(3+)纳米粒子的红色或绿色UC发射在反蛋白石基底上选择性增强。此外，通过金属纳米颗粒等离子体激元和光子晶体效应的耦合诱导NaYF4：Yb(3+)、Er(3+)纳米颗粒的UC发射增强在反蛋白石基底中包含的Ag纳米颗粒上实现。目前的结果表明，Ag 纳米粒子与反蛋白石光子晶体的耦合提供了增强稀土离子掺杂纳米粒子的 UC 发射的有用策略。
Rare-earth-ion-doped upconversion (UC) nanoparticles have generated considerable interest because of their potential application in solar cells, biological labeling, therapeutics, and imaging. However, the applications of UC nanoparticles were still limited because of their low emission efficiency. Photonic crystals and noble metal nanoparticles are applied extensively to enhance the UC emission of rare earth ions. In the present work, a novel substrate consisting of inverse opal photonic crystals and Ag nanoparticles was prepared by the template-assisted method, which was used to enhance the UC emission of NaYF4: Yb(3+), Er(3+) nanoparticles. The red or green UC emissions of NaYF4: Yb(3+), Er(3+) nanoparticles were selectively enhanced on the inverse opal substrates because of the Bragg reflection of the photonic band gap. Additionally, the UC emission enhancement of NaYF4: Yb(3+), Er(3+) nanoparticles induced by the coupling of metal nanoparticle plasmons and photonic crystal effects was realized on the Ag nanoparticles included in the inverse opal substrate. The present results demonstrated that coupling of Ag nanoparticle with inverse opal photonic crystals provides a useful strategy to enhance UC emission of rare-earth-ion-doped nanoparticles.