Modulated photoluminescence of graphene quantum dots in the vicinity of an individual silver nano-octahedron.

Modulated photoluminescence of graphene quantum dots in the vicinity of an individual silver nano-octahedron.
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单个银纳米八面体附近石墨烯量子点的调制光致发光

DOI:
10.1039/c3cp53660b
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发表时间:
2014-02
期刊:
Phys. Chem. Chem. Phys.
影响因子:
--
通讯作者:
W. S. Wang D. W. He*, Y. S. Wang*
W. S. Wang D. W. He*, Y. S. Wang*
中科院分区:
其他
文献类型:
--
作者:
W. S. Wang D. W. He*, Y. S. Wang*

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我们提出了一种有效的策略,利用三维时域有限差分计算来增强和调制单个银纳米八面体(SNO)附近石墨烯量子点(GQD)的光致发光(PL)。 SNO 被设计用作多频等离子体天线,具有覆盖 GQD 多个发射峰的多种等离子体共振模式。通过 GQD 相对于 SNO 的位置​​和偶极矩方向的变化,研究了自发辐射的光谱变化。通过与设计的天线的强相互作用,GQD的PL颜色可以在蓝色和绿色之间精确调节。 GQD 的多色特性也将促进其作为环保和多功能光学探针的潜在应用。该研究有助于更深入地了解金属纳米粒子附近 GQD 的 PL 特性。
We propose an effective strategy to enhance and modulate the photoluminescence (PL) of graphene quantum dots (GQDs) in the vicinity of a single silver nano-octahedron (SNO) utilizing three-dimensional finite-difference time-domain calculations. The SNO is designed to act as a multifrequency plasmonic antenna with multiple plasmon resonance modes covering multiple emission peaks of GQDs. The spectral modifications of spontaneous emission are investigated with the variations of the GQD's position and dipole moment orientation relative to the SNO. The PL colour of the GQD can be precisely adjusted between blue and green through the strong interaction with the designed antenna. The multicolour features of GQDs will also facilitate their potential applications as eco-friendly and multifunctional optical probes. The study contributes to a deeper understanding of the PL properties of GQDs near the metallic nanoparticles.
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