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

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
Bioengineered nanomaterials for dynamic diagnostics in vivo DOI
Jizhong Wu, Xinyu Zhou, Chung Yin Tsang

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

By integrating four energy modalities—NIR light, radiation, magnetic field, and ultrasound—with bioengineered nanomaterials, dynamic in vivo diagnostics can be achieved, advancing the path toward personalized precision medicine.

Language: Английский

Citations

0
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

Citations

1