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Aggregation of Metal-Nanoparticle-Induced Fluorescence Enhancement and Its Application in Sensing.
ACS Omega ( IF 4.1 ) Pub Date : 2019-12-27 , DOI: 10.1021/acsomega.9b03560
Shuang Li 1, 2 , Jiangling He 2, 3 , Qing-Hua Xu 2, 3
Affiliation  

Fluorescence-based detection methods have been widely utilized in various applications. Materials that display aggregation-induced emission (AIE) are excellent fluorescence probes to offer high contrast ratio. Chromophore-conjugated plasmonic metal nanoparticles (NPs) have been recently found to display significantly enhanced fluorescence emission upon the formation of aggregates. This new type of AIE enhancement has a totally different working mechanism. It is based on aggregation-induced plasmon coupling of metal NPs to enhance the fluorescence intensity of chromophores by increasing both the excitation efficiency and radiative decay rates, instead of reducing nonradiative decay rates as in typical AIE. AIE enhancement of chromophore-conjugated metal NPs results in a dramatic change in fluorescence intensity from severely quenched fluorescence to significantly enhanced fluorescence upon aggregate formation. It offers excellent contrast ratio and is attractive for developing platforms for highly sensitive sensing and imaging applications with reduced background. This mini-review summarizes the basic working principle and recent progress in fluorescence enhancement by coupled metal NPs on the single-molecule level, aggregation-induced plasmon coupling enhanced fluorescence of chromophore-conjugated metal NPs, and their applications in sensing. Perspectives on further utilization of this interesting phenomenon for various biomedical applications have also been discussed.

中文翻译:

金属-纳米粒子诱导的荧光增强聚集及其在传感中的应用。

基于荧光的检测方法已广泛用于各种应用中。显示聚集诱导发射(AIE)的材料是出色的荧光探针,可提供高对比度。最近发现,发色团共轭的等离激元金属纳米粒子(NPs)在形成聚集体时显示出显着增强的荧光发射。这种新型的AIE增强功能具有完全不同的工作机制。它基于聚集诱导的金属NP的等离激元耦合,通过提高激发效率和辐射衰减率来增强发色团的荧光强度,而不是像典型的AIE那样降低非辐射衰减率。生色团共轭金属NP的AIE增强导致荧光强度从剧烈淬灭的荧光急剧变化到聚集体形成后显着增强的荧光。它提供出色的对比度,并且对于开发用于背景降低的高度敏感的传感和成像应用的平台具有吸引力。本微型综述总结了在单分子水平上通过偶联金属NP增强荧光的基本工作原理和最新进展,在生色团偶联金属NP上聚集诱导的等离子体耦合偶联增强的荧光及其在传感中的应用。还讨论了在各种生物医学应用中进一步利用这一有趣现象的观点。它提供了出色的对比度,并且对于开发具有降低背景的高灵敏度传感和成像应用的平台具有吸引力。本微型综述总结了在单分子水平上通过偶联金属NP增强荧光的基本工作原理和最新进展,在生色团偶联金属NP上聚集诱导的等离子体耦合偶联增强的荧光及其在传感中的应用。还讨论了在各种生物医学应用中进一步利用这一有趣现象的观点。它提供了出色的对比度,并且对于开发具有降低背景的高灵敏度传感和成像应用的平台具有吸引力。本微型综述总结了在单分子水平上通过偶联金属NP增强荧光的基本工作原理和最新进展,在生色团偶联金属NP上聚集诱导的等离子体耦合偶联增强的荧光及其在传感中的应用。还讨论了在各种生物医学应用中进一步利用这一有趣现象的观点。本微型综述总结了在单分子水平上通过偶联金属NP增强荧光的基本工作原理和最新进展,在生色团偶联金属NP上聚集诱导的等离子体耦合偶联增强的荧光及其在传感中的应用。还讨论了在各种生物医学应用中进一步利用这一有趣现象的观点。本微型综述总结了在单分子水平上通过偶联金属NP增强荧光的基本工作原理和最新进展,在生色团偶联金属NP上聚集诱导的等离子体耦合偶联增强的荧光及其在传感中的应用。还讨论了在各种生物医学应用中进一步利用这一有趣现象的观点。
更新日期:2020-01-14
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