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Related Experiment Video

Updated: Mar 18, 2026

Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications

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Published on: October 5, 2018

Enhanced UV upconversion emission using plasmonic nanocavities.

Ahmed El Halawany, Sha He, Hossein Hodaei

|July 14, 2016

Summary

This summary is machine-generated.

Researchers enhanced ultraviolet (UV) light emission from nanoparticles using plasmonic nanocavities. This breakthrough significantly boosts the efficiency of upconversion processes for applications in bio-imaging and diagnostics.

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Last Updated: Mar 18, 2026

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Triplet Fusion Upconversion Nanocapsule Synthesis

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Area of Science:

Materials Science
Nanotechnology
Photonics

Background:

Upconversion of near-infrared (NIR) to ultraviolet (UV) radiation is crucial for advanced applications like bio-imaging, diagnostics, and drug delivery.
Bare nanoparticles exhibit very low conversion efficiency, limiting their practical use.

Purpose of the Study:

To experimentally demonstrate significantly enhanced UV upconversion emission from core-shell nanoparticles.
To investigate the role of plasmonic nanocavities in boosting upconversion efficiency.

Main Methods:

Synthesized β-NaYF4:Gd3+/Yb3+/Tm3+ @NaLuF4 core-shell nanoparticles.
Designed and investigated various plasmonic nanocavities (different metal platforms and nanostructures).
Trapped nanoparticles within optimized nanocavities to enhance upconversion emission.

Main Results:

Achieved a record 170-fold enhancement in UV upconversion emission at 345 nm using a cross-shape silver nanocavity.
Demonstrated that plasmonic nanocavities dramatically improve NIR to UV conversion efficiency.

Conclusions:

Plasmonic nanocavities are highly effective in enhancing UV upconversion emission from nanoparticles.
The enhancement is attributed to increased NIR absorption, tailored local density of states, and improved light out-coupling by the cavity.