Dramatic Enhancement of Quantum Cutting in Lanthanide-Doped Nanocrystals Photosensitized with an Aggregation-Induced Enhanced Emission Dye

Shao, Wei; Lim, Chang Keun; Li, Qi; Swihart, Mark T.; Prasad, Paras N.

doi:10.1021/acs.nanolett.8b01724

Cited by 41 publications

(29 citation statements)

References 37 publications

(62 reference statements)

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“…Specifically, the energy of photons can be converted through rational designed transition among their abundant energy levels ( Auzel, 2004 ; Wen et al, 2018 ). Furthermore, the photo-luminescence of rare earth is extremely stable, and it could not be affected by blinking or photobleaching ( Shao et al, 2018 ; Song et al, 2019 ). These advantages make rare earth elements perfect candidates for light-triggered diagnostics and therapy ( Chen et al, 2014 ; Shao et al, 2016 ; Qiang and Wang, 2019 ; Wang et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles

Feng

Zheng

et al. 2021

Front. Chem.

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The availability of colloidal nano-materials with high efficiency, stability, and non-toxicity in the near infrared-II range is beneficial for biological diagnosis and therapy. Rare earth doped nanoparticles are ideal luminescent agents for bio-applications in the near infrared-II range due to the abundant energy level distribution. Among them, both excitation and emission range of Er3+ ions can be tuned into second biological window range. Herein, we report the synthesis of ∼15 nm LiYF4, NaYF4, and NaGdF4 nanoparticles doped with Er3+ ions and their core-shell structures. The luminescent properties are compared, showing that Er3+ ions with single-doped LiYF4 and NaYF4 nanoparticles generate stronger luminescence than Er3+ ions with doped NaGdF4, despite the difference in relative intensity at different regions. By epitaxial growth an inert homogeneous protective layer, the surface luminescence of the core-shell structure is further enhanced by about 5.1 times, 6.5 times, and 167.7 times for LiYF4, NaYF4, and NaGdF4, respectively. The excellent luminescence in both visible and NIR range of these core-shell nanoparticles makes them potential candidate for bio-applications.

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Section: Introductionmentioning

confidence: 99%

NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles

Feng

Zheng

et al. 2021

Front. Chem.

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“…It can be estimated that 85% of the dye molecules give rise to ET to Er 3 with 92% efficiency, whereas the remaining population of excited molecules transfer energy with 78% efficiency, as calculated from time-resolved PL experiments. This estimation yields an overall sensitization efficiency of over 89% (0.85 × 92% 0.15 × 78% 89.9%), which is much higher than those previously reported for dye-sensitized Ln 3 luminescence nanoparticles [17,45,52].…”

Section: Resultsmentioning

confidence: 57%

“…The sensitization efficiency from the donor FITC to the acceptor Ln 3 can be estimated by the simplified Eq. ( 1) [45],…”

Section: Resultsmentioning

confidence: 99%

Dye-sensitized Er³⁺-doped CaF₂ nanoparticles for enhanced near-infrared emission at 1.5 μm

et al. 2021

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Lanthanide (Ln)-doped nanoparticles have shown potential for applications in various fields. However, the weak and narrow absorption bands of the Ln ions (Ln 3 ), hamper efficient optical pumping and severely limit the emission intensity. Dye sensitization is a promising way to boost the near-infrared (NIR) emission of Er 3 , hence promoting possible application in optical amplification at 1.5 μm, a region that is much sought after for telecommunication technology. Herein, we introduce the fluorescein isothiocyanate (FITC) organic dye with large absorption cross section as energy donor of small-sized (∼3.6 nm) Er 3 -doped CaF 2 nanoparticles. FITC molecules on the surface of CaF 2 work as antennas to efficiently absorb light, and provide the indirect sensitization of Er 3 boosting its emission. In this paper, we employ photoluminescence and transient absorption spectroscopy, as well as density functional theory calculations, to provide an in-depth investigation of the FITC → Er 3 energy transfer process. We show that an energy transfer efficiency of over 89% is achieved in CaF 2 :Er 3 @FITC nanoparticles resulting in a 28 times enhancement of the Er 3 NIR emission with respect to bare CaF 2 :Er 3 . Through the multidisciplinary approach used in our work, we are able to show that the reason for such high sensitization efficiency stems from the suitable size and geometry of the FITC dye with a localized transition dipole moment at a short distance from the surface of the nanoparticle.

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“…Reproduced with permission from Ref. [57]. Copyright 2018, American Chemical Society the nanoprobes for 24 or 48 h by a standard methyl thiazolyl tetrazolium assay, indicating negligible cytotoxicity for these nanoprobes.…”

Section: Biocompatibility Of Nanoprobesmentioning

confidence: 99%

Luminescent nano‐bioprobes based on NIR dye/lanthanide nanoparticle composites

et al. 2021

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Near-infrared (NIR) light, which has ignorable tissue scattering/absorption, minimal photodamage, and no autofluorescence interference, is highly favorable for bioapplications. NIR dye and lanthanide-doped nanoparticle (LnNP), as representative NIR-excited luminescence probes, have attracted increasing interest due to their unique optical property and low biological toxicity. Design of luminescence probes based on NIR dye/LnNP nanocomposites cannot only integrate the advantages but also achieve additional functions via regulating internal energy transfer pathways. In this review, we focus on the most recent advances in the development of NIR dye/LnNP nanocomposites as potential bioprobes, which cover from their fundamental photophysics to bioapplications, including energy transfer mechanisms, interface engineering (involving binding interaction, distance, and aggregation as key factors), and their applications for dye-sensitized upconversion/downshifting luminescent bioimaging, detection of biomolecules, and NIR-triggered diagnosis and therapy. Some future prospects and efforts toward this active research field are also envisioned. K E Y W O R D S dye sensitization, energy transfer, interface engineering, lanthanide-doped nanoparticle, nano-bioprobe, NIR dye This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Dramatic Enhancement of Quantum Cutting in Lanthanide-Doped Nanocrystals Photosensitized with an Aggregation-Induced Enhanced Emission Dye

Cited by 41 publications

References 37 publications

NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles

NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles

Dye-sensitized Er³⁺-doped CaF₂ nanoparticles for enhanced near-infrared emission at 1.5 μm

Luminescent nano‐bioprobes based on NIR dye/lanthanide nanoparticle composites

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Dramatic Enhancement of Quantum Cutting in Lanthanide-Doped Nanocrystals Photosensitized with an Aggregation-Induced Enhanced Emission Dye

Cited by 41 publications

References 37 publications

NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles

NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles

Dye-sensitized Er3+-doped CaF2 nanoparticles for enhanced near-infrared emission at 1.5 μm

Luminescent nano‐bioprobes based on NIR dye/lanthanide nanoparticle composites

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Dye-sensitized Er³⁺-doped CaF₂ nanoparticles for enhanced near-infrared emission at 1.5 μm