研究目的
To enhance the photoluminescence (PL) emission of rare-earth activated upconversion nanoparticles (UCNPs) for bioimaging applications using lithographically fabricated metal-insulator-metal (MIM) nanostructures.
研究成果
The MIM nanostructures demonstrate unprecedented enhancement of upconversion luminescence, with potential for bioimaging and therapeutic applications. The study provides a scalable method for producing high-performance plasmon-enhanced UCNPs.
研究不足
The fabricated MIM structures exhibit some roughness and deviation from ideal geometry, leading to discrepancies between simulated and measured enhancement factors. The colloidal stability of MIMs in solution is limited to about 12 hours.
1：Experimental Design and Method Selection:
The study involved the design and fabrication of MIM nanostructures using laser interference lithography to achieve plasmonic enhancement of UCNPs. The methodology included steady state and transient PL spectroscopy, electrodynamic simulations, and rate equations analysis.
2：Sample Selection and Data Sources:
NaYF4:Yb3+,Er3+ UCNPs were synthesized and used as the insulator layer in MIM nanostructures. The samples were characterized using SEM, TEM, and PL measurements.
3：List of Experimental Equipment and Materials:
Equipment included a confocal laser scanning microscope, spectrometer, thermal evaporator, and SEM. Materials included gold, NaYF4:Yb3+,Er3+ UCNPs, and photoresist.
4：Experimental Procedures and Operational Workflow:
The fabrication process involved lithographic patterning, gold deposition, UCNP dropcasting, and resist removal. PL measurements were conducted under NIR excitation.
5：Data Analysis Methods:
Data analysis involved comparing PL intensities, simulating field profiles, and analyzing rate equations to quantify enhancement and quenching effects.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
