Modulation of lanthanide luminescence <i>via</i> an electric field

Wang, Yangbo; Gao, Jiaxin; Gao, Chao; Ma, Hui; Yang, Bingxiao; Han, Yingdong; Zhou, En‐Long; Cheng, Qianya; Jing, Su; Huang, Ling

doi:10.1039/c9nr04684d

Cited by 11 publications

(7 citation statements)

References 64 publications

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“…In recent years, fluorescent Ln-based materials have aroused enormous interest owing to their multiple applications in lamp phosphors, sensing, imaging, and displaying. , Dopamine (DA) is a crucial catecholamine neurotransmitter and plays a significant function in cardiovascular, central nervous, and hormonal systems. The abnormal DA levels may bring about neurological disorders involving Alzheimer’s and Parkinson’s diseases. − As a consequence, it is vitally important to seek a sensitive and selective method to detect DA for early diagnosis of diseases.…”

Section: Resultsmentioning

confidence: 99%

Lanthanide-Incorporated Polyoxometalates Assembled from Mixed-Heteroatom-Oriented Three-Layered Cage Clusters

et al. 2022

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Discovering innovative metal-oxo cluster materials with uncommon building blocks and exploiting their application potentiality are fairly challengeable. Here, we provide a novel type of lanthanide-incorporated polyoxometalates [H2N(CH3)2]10Na8H6{[Ln0.5/Na0.5(HGCA)(H2O)1.5]2[(BiO3)(SeO3)2W21O66]2}·36H2O [Ln = Eu3+ (1), Er3+ (2), H2GCA = α-glycolic acid] synthesized by a dual-heteroatom-directed synergetic strategy, which are established from two unique BiIII–SeIV heteroatom-oriented cylindrical three-layered [(BiO3)(SeO3)2W21O66]13– cage clusters integrated by lanthanide-organic groups. Compound 1 works as a fluorescence probe for high-sensitivity detection toward a neurotransmitter dopamine. This finding not only shows the enormous possibility and feasibility to create novel polyoxometalate building units by means of the self-categorization of different heteroatoms, which are subsequently employed for further assembly chemistry, but also provides a platform to exploit latent utilizations of polyoxometalate-based materials in the realm of detecting biological molecules.

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Section: Resultsmentioning

confidence: 99%

Lanthanide-Incorporated Polyoxometalates Assembled from Mixed-Heteroatom-Oriented Three-Layered Cage Clusters

et al. 2022

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“…We customize meta-learning by using topic similarity to adaptively control how the meta parameter will initialize the topic-specific parameter. One concurrent work [28] combines MAML and neural processes to deal with misinformation.…”

Section: Meta-learningmentioning

confidence: 99%

“…We differ from this work from two aspects: (1) the proposed taskaware Bayesian meta-learning algorithm can provide uncertainty estimation that is infeasible for optimization-based meta-learning including MAML, and is less prone to be under-fitting than neural processes; and (2) we use topic similarity when adapting global knowledge to tasks, which addresses the concern of dissimilar task distributions in [28].…”

Section: Meta-learningmentioning

confidence: 99%

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Learning to Detect Few-Shot-Few-Clue Misinformation

Zhang

Huang²,

Liang³

et al. 2021

Preprint

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A large volume of false textual information has been disseminating for a long time since the prevalence of social media. The potential negative influence of misinformation on the public is a growing concern. Therefore, it is strongly motivated to detect online misinformation as early as possible. Few-shot-few-clue learning applies in this misinformation detection task when the number of annotated statements is quite few (called few shots) and the corresponding evidence is also quite limited in each shot (called few clues). Within the few-shot-few-clue framework, we propose a task-aware Bayesian meta-learning algorithm to extract shared patterns among different topics (i.e. different tasks) of misinformation. Moreover, we derive a scalable method, i.e., amortized variational inference, to optimize the Bayesian meta-learning algorithm. Empirical results on three benchmark datasets demonstrate the superiority of our algorithm. This work focuses more on optimizing parameters than deigning detection models, and will generate fresh insights into data efficient detection of online misinformation at early stages.

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“…Improving the luminescence efficiency and regulating the luminescence properties of lanthanide materials have become the focus on the research of these materials. Many ways to enhance luminescence have been demonstrated, such as high-temperature solid status reaction method [6], electric field enhancement [7], aggregation-induced emission [8], and so on. Remarkable progress has been made over the past ten years in lanthanide materials' luminescence enhancement, which leads to the modification of the excitation or emission process and the alterations of luminescence lifetimes and quantum yields of lanthanide materials.…”

Section: Introductionmentioning

confidence: 99%

Modulated Luminescence of Lanthanide Materials by Local Surface Plasmon Resonance Effect

et al. 2021

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Lanthanide materials have great applications in optical communication, biological fluorescence imaging, laser, and so on, due to their narrow emission bandwidths, large Stokes’ shifts, long emission lifetimes, and excellent photo-stability. However, the photon absorption cross-section of lanthanide ions is generally small, and the luminescence efficiency is relatively low. The effective improvement of the lanthanide-doped materials has been a challenge in the implementation of many applications. The local surface plasmon resonance (LSPR) effect of plasmonic nanoparticles (NPs) can improve the luminescence in different aspects: excitation enhancement induced by enhanced local field, emission enhancement induced by increased radiative decay, and quenching induced by increased non-radiative decay. In addition, plasmonic NPs can also regulate the energy transfer between two close lanthanide ions. In this review, the properties of the nanocomposite systems of lanthanide material and plasmonic NPs are presented, respectively. The mechanism of lanthanide materials regulated by plasmonic NPs and the scientific and technological discoveries of the luminescence technology are elaborated. Due to the large gap between the reported enhancement and the theoretical enhancement, some new strategies applied in lanthanide materials and related development in the plasmonic enhancing luminescence are presented.

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Modulation of lanthanide luminescence via an electric field

Abstract: In situ, real-time, and reversible modulation of the luminescence of lanthanide doped in semiconductors was realized by adjusting the photo-generated charge carrier mobilities via an externally applied electric field.

Cited by 11 publications

References 64 publications

Lanthanide-Incorporated Polyoxometalates Assembled from Mixed-Heteroatom-Oriented Three-Layered Cage Clusters

Lanthanide-Incorporated Polyoxometalates Assembled from Mixed-Heteroatom-Oriented Three-Layered Cage Clusters

Learning to Detect Few-Shot-Few-Clue Misinformation

Modulated Luminescence of Lanthanide Materials by Local Surface Plasmon Resonance Effect

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