Large-Area Near-Infrared Emission Enhancement on Single Upconversion Nanoparticles by Metal Nanohole Array

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-05-06 DOI:10.1021/acs.nanolett.4c01016

Xiaomiao Li, Yao Wang, Jinlong Shi, Zinan Zhao, Dajing Wang, Ziyuan Chen, Long Cheng, Guang-Hong Lu, Yusen Liang, Hao Dong*, Xuchen Shan, Baolei Liu, Chaohao Chen, Yongtao Liu, Famin Liu, Ling-Dong Sun, Xiaolan Zhong* and Fan Wang*,

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Abstract

Single lanthanide (Ln) ion doped upconversion nanoparticles (UCNPs) exhibit great potential for biomolecule sensing and counting. Plasmonic structures can improve the emission efficiency of single UCNPs by modulating the energy transferring process. Yet, achieving robust and large-area single UCNP emission modulation remains a challenge, which obstructs investigation and application of single UCNPs. Here, we present a strategy using metal nanohole arrays (NHAs) to achieve energy-transfer modulation on single UCNPs simultaneously within large-area plasmonic structures. By coupling surface plasmon polaritons (SPPs) with higher-intermediate state (¹D₂ → ³F₃, ¹D₂ → ³H₄) transitions, we achieved a remarkable up to 10-fold enhancement in 800 nm emission, surpassing the conventional approach of coupling SPPs with an intermediate ground state (³H₄ → ³H₆). We numerically simulate the electrical field distribution and reveal that luminescent enhancement is robust and insensitive to the exact location of particles. It is anticipated that the strategy provides a platform for widely exploring applications in single-particle quantitative biosensing.

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金属纳米孔阵列对单个上转换纳米粒子的大面积近红外发射增强作用

单个掺杂镧系元素（Ln）离子的上转换纳米粒子（UCNPs）在生物分子传感和计数方面具有巨大潜力。质子结构可通过调节能量传递过程提高单个 UCNPs 的发射效率。然而，实现稳健的大面积单 UCNP 发射调制仍然是一个挑战，这阻碍了单 UCNP 的研究和应用。在这里，我们提出了一种利用金属纳米孔阵列（NHA）在大面积等离子体结构中同时实现单个 UCNPs 能量转移调制的策略。通过将表面等离子体极化子（SPPs）与更高的中间态（1D2 → 3F3、1D2 → 3H4）跃迁耦合，我们实现了 800 纳米发射率高达 10 倍的显著增强，超过了将 SPPs 与中间基态（3H4 → 3H6）耦合的传统方法。我们对电场分布进行了数值模拟，结果表明，发光增强效果很强，而且对粒子的确切位置不敏感。预计该策略将为广泛探索单颗粒定量生物传感的应用提供一个平台。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.