Tunable Multicolor in Heterojunction Ln(BTB) Fast Prepared by Liquid Plasma with In Situ Spectral Monitoring for...

Area of Science:

• Materials Science
• Nanotechnology
• Luminescence

Background:

• Lanthanide metal-organic frameworks (Ln-MOFs) are promising multicolor luminescence nanomaterials.
• Fabricating high-quality, tunable multicolor Ln-MOFs for optical applications is challenging due to processing limitations.

Purpose of the Study:

• To develop a novel method for fabricating multicolor heterojunction Ln-MOFs.
• To achieve precise control over luminescence color through adjustable lanthanide ratios.
• To explore the potential of these materials in anticounterfeiting applications.

Main Methods:

• Utilized an integrated device with dielectric barrier discharge (DBD) liquid plasma for synthesis.
• Coupled plasma synthesis with in situ spectral monitoring for real-time feedback.
• Adjusted the Terbium (Tb³⁺)-to-Europium (Eu³⁺) ratio to tune multicolor output.
• Characterized the heterojunction Ln-MOFs using XRD, IR, UV-vis, SEM, and photoluminescence.

Main Results:

• Successfully fabricated multicolor heterojunction Ln-MOFs with precise color control (red to green).
• Demonstrated effective suppression of direct Tb³⁺-to-Eu³⁺ energy transfer via heterojunction architecture.
• Validated the material's potential for anticounterfeiting applications through performance studies.

Conclusions:

• The DBD liquid plasma approach offers a viable method for producing tunable multicolor Ln-MOFs.
• Heterojunction architecture is key to controlling luminescence and preventing energy transfer issues.
• These advanced Ln-MOFs show significant promise for anticounterfeiting and other optical technologies.