Fluorescent silica nanoparticles and method for producing the same
Fluorescent silica nanoparticles with a core-shell structure, comprising silica-encapsulated gold nanoparticles and silica-encapsulated rare-earth complexes, address the issue of shortened fluorescence lifetime at high concentrations by enhancing the fluorescence lifetime by 1.5 times.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TOSOH CORP
- Filing Date
- 2024-11-14
- Publication Date
- 2026-05-26
AI Technical Summary
Existing fluorescent nanoparticles, particularly those encapsulating rare earth fluorescent complexes, suffer from significantly shortened fluorescence lifetime when used at high concentrations.
The development of fluorescent silica nanoparticles with a core-shell structure, where the core is composed of silica-encapsulated gold nanoparticles and the shell is composed of silica-encapsulated rare-earth fluorescent complexes, effectively prolongs the fluorescence lifetime even at high concentrations of rare-earth fluorescent complexes.
The core-shell structure enables a fluorescence lifetime that is 1.5 times longer than comparative nanoparticles without gold nanoparticles, maintaining fluorescence intensity despite high concentrations of rare-earth complexes.
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