Guided-Mode Resonance-Assisted Photon Avalanche Emission from Tm3+-Doped NaYF4 Upconverting Nanoparticles: Implications for Biosensing Applications DOI

Thanh-Thu Le-Vu,

Jia-Rong Chang,

Van-Dai Pham

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Photon avalanche (PA) upconverting nanoparticles (UCNPs) have attracted great interest because they can exhibit giant changes in upconversion luminescence (UCL) intensity through small perturbations of excitation light. The discovery PA UCNPs opens up their applications super-resolution imaging, microlasers and optical environmental sensing. These rely heavily on low threshold high nonlinear order UCNPs. So far, the only be reduced material modification. In this work, a strategy is proposed to reduce required light source generate UCL from guided-mode resonance (GMR) effect an optimal resonant waveguide grating (RWG) structure. Before using RWG structure, Tm3+-doped NaYF4 (NaYF4:Tm3+) core deposited glass substrate ∼7.1 kW/cm2 produce with (n) ∼ 25.9. comparison, when were coated surface water-covered structure excited under GMR condition, 2.72 was needed induce n 39.5. This strongly enhanced local electric field formed which enhances interaction between UCNPs, thereby significantly reducing powerfully enhance performance combination developed into ultrasensitive sandwich-type immunosensors for biosensing applications.

Language: Английский

Intrinsic optical bistability of photon avalanching nanocrystals DOI
Artiom Skripka, Zhuolei Zhang, Xiao Qi

et al.

Nature Photonics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Language: Английский

Citations

4
Enhanced upconversion and photoconductive nanocomposites of lanthanide-doped nanoparticles functionalized with low-vibrational-energy inorganic ligands DOI
Jia‐Ahn Pan, Xiao Qi, Emory M. Chan

et al.

Nanoscale Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Upconverting nanoparticles (UCNPs) convert near-infrared (IR) light into higher-energy visible light, allowing them to be used in applications such as biological imaging, nano-thermometry, and photodetection. It is well known that the upconversion luminescent efficiency of UCNPs can enhanced by using a host material with low phonon energies, but use low-vibrational-energy inorganic ligands non-epitaxial shells has been relatively underexplored. Here, we investigate functionalization lanthanide-doped NaYF4 Sn2S64- ligands. Raman spectroscopy elemental mapping are employed confirm binding UCNPs. This enhances efficiencies up factor 16, consistent an increase lifetimes lanthanide ions. Annealing Sn2S64--capped results formation nanocomposite comprised embedded within interconnected matrix SnS2, enabling each UCNP electrically accessible through semiconducting SnS2 matrix. facilitates integration electronic devices, which demonstrate fabrication UCNP-SnS2 photodetector detects UV near-IR light. Our findings show promise capping agents enhance properties while facilitating their optoelectronic devices.

Language: Английский

Citations

1
Active Learning of Ligands That Enhance Perovskite Nanocrystal Luminescence DOI
Min A Kim, Qianxiang Ai, Alexander J. Norquist

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(22), P. 14514 - 14522

Published: May 22, 2024

Ligands play a critical role in the optical properties and chemical stability of colloidal nanocrystals (NCs), but identifying ligands that can enhance NC is daunting, given high dimensionality space. Here, we use machine learning (ML) robotic screening to accelerate discovery photoluminescence quantum yield (PLQY) CsPbBr3 perovskite NCs. We developed ML model designed predict relative PL enhancement NCs when coordinated with ligand selected from pool 29,904 candidate molecules. Ligand candidates were using an active (AL) approach accounted for uncertainty quantified by twin regressors. After eight experimental iterations batch AL (corresponding 21 initial 72 model-recommended ligands), decreased, demonstrating increased confidence predictions. Feature importance counterfactual analyses predictions illustrate potential field strength designing PL-enhancing ligands. Our versatile framework be readily adapted screen effect on wide range nanomaterials.

Language: Английский

Citations

6
Background-free luminescent and chromatic assay for strong visual detection of creatinine DOI
Wei Guo,

Kangran Li,

Yu Hao

et al.

Talanta, Journal Year: 2025, Volume and Issue: 287, P. 127631 - 127631

Published: Jan. 26, 2025

Language: Английский

Citations

0
Self-Assembled Subwavelength Nanophotonic Structures for Spatial Object Localization and Tracking DOI
Jianpeng Ma, Ziguang Zhao, Yingjie Zhao

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Subwavelength resonant nanostructures have facilitated strong light–matter interactions and tunable degrees of freedom light, such as spectrum, polarization, direction, thus boosting photonic applications toward light emission, manipulation, detection. For photodetection, enabled emerging technologies, detection ranging, spectrometers, polarimeters, within an ultracompact footprint. However, nanophotonics usually relies on nanofabrication technology, which suffers from the trade-offs between precision scalability. Here, we first realize self-assembly subwavelength metal-halide perovskites for spatial object localization tracking. By steering crystallization along capillary corner bridges localized at edges, achieve single crystallinity, size, coupling perovskite nanowires, leading to angle-resolved photodetector with angular resolution 0.523°. Furthermore, integrate multiple pairs coupled nanowires two orthogonal orientations form arrays both static moving objects error less than 0.6 cm. These findings create a platform self-assembled nanostructures, paving way multifunctional nanophotonic optoelectronic devices.

Language: Английский

Citations

0
Direct Optical Lithography: Toward Nondestructive Patterning of Nanocrystal Emitters DOI Creative Commons
Seongkyu Maeng, Himchan Cho

Accounts of Materials Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

Citations

0
Sidelobe-free deterministic 3D nanoscopy with λ/33 axial resolution DOI Creative Commons

Binxiong Pan,

Baoju Wang,

Yue Ni

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: April 21, 2025

Abstract Deterministic three-dimensional (3D) super-resolution microscopy can achieve light-matter interaction in a small volume, but usually with the axial extension distinctly more elongated than lateral one. The isoSTED method combining two opposing objectives and multiple laser beams offer high at λ/12 level, cost of optical system complexity inherent sidelobes. high-order nonlinear effect by multiphoton excitation would benefit to sub-diffraction resolution as well suppress Herein, an easy-to-use, sidelobe-free deterministic 3D nanoscopy resolution, we developed purely physical strategy (UNEx-4Pi) fusion ultrahighly (UNEx) photon avalanching nanoparticles mirror-based bifocal vector field modulation (4Pi). theoretical studies UNEx-4Pi concept showed that main peak fluorescence spot became sharper its large sidelobe height was suppressed increasing nonlinearity. In addition, simplicity robustness were demonstrated utilizing mirror-assisted single-objective self-interference strategy. Experimentally, realized extremely constringent focal without sidelobes observed, achieving up λ/33 (26 nm) using one low-power CW beam. We also ability scheme bioimaging nuclear envelope BSC-1 cells stained imaged 32 nm. proposed will pave way for highly confined space, thereby advancing cutting-edge technologies like sensing, imaging, lithography, data storage.

Language: Английский

Citations

0
Interfacial Molecular Engineering of Rare Earth‐Doped Nanocrystals: Basic Principles, Construction Strategies, and Advanced Applications DOI

Guiqiang Pu,

Junnan Song,

Zhenjie Cheng

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Abstract Interfacial molecular engineering of rare earth‐doped nanocrystals (RE NCs) by incorporating surface organic emitters is receiving widespread attention in the area functional nanomaterials. The resulting organic–inorganic nanoconjugates are able to integrate individual strengths and show exciting optical/electrical/magnetic functionalities. However, there a shortage systematic reviews reporting most recent progress interfacial RE NCs. Thereby, this review presents comprehensive timely perspective on advances crucial theoretical knowledge first summarized, ranging from luminescence mechanism molecules/RE NCs energy transfer mechanisms at interface. Construction protocols for coupling molecules then discussed, including chemical coordination physical adsorption pathways. In particular, beyond traditional bio‐imaging/therapy, advanced applications enabled interface outlined, not limited photoexcited 3D printing, light‐induced photochromism/deformation, micro‐modification, dynamic procedure regulation. Finally, challenges perspectives presented accelerate future provide research guidance This provides deeper broader understanding NC pushes technology closer practical applications.

Language: Английский

Citations

0
Recent advances in fundamental research on photon avalanches on the nanometre scale DOI Creative Commons

S. L. Aggarwal

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Overview of photon avalanche upconversion: history, imaging applications, photonic and challenges for frontier applications. Image created with BioRender.

Language: Английский

Citations

0
Unraveling the myths and mysteries of photon avalanching nanoparticles DOI
Artiom Skripka, Emory M. Chan

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Photon avalanching (PA) nanomaterials exhibit some of the most nonlinear optical phenomena reported for any material, allowing them to push frontiers applications ranging from nanoscale imaging and sensing computing. But PA remains shrouded in mystery, with its underlying physics limitations misunderstood. is not, fact, an avalanche photons, at least not same way that snowballs beget more snowballing actual avalanche. In this focus article, we dispel these other common myths surrounding lanthanide-based nanoparticles unravel mysteries unique effect. We hope removing misconceptions will inspire new interest harness giant nonlinearity across a broad range scientific fields.

Language: Английский

Citations

0