研究目的
Investigating the synthesis of Al-Al2O3@C core-shell nanoparticles with deep-ultraviolet localized surface plasmon resonances (LSPR) and their application in enhancing the blue fluorescence intensity from CsPbBr3-xClx.
研究成果
Al-Al2O3@C nanoparticles with deep-ultraviolet LSPR were successfully fabricated via LAL. The carbon layer enhances the stability and reduces oxidation of Al nanoparticles. The LSPR peak red shifts with increasing laser radiation time due to increased oxidation. The nanoparticles demonstrated enhanced PL intensity of CsPbBr3-xClx QDs, which is significant for the development of blue LEDs.
研究不足
The degree of oxidation of Al nanoparticles increases with laser ablation time, which may affect the LSPR peak position. The theoretical model simplifies the experimental conditions, leading to deviations in the simulation results.
1：Experimental Design and Method Selection:
Laser ablation in liquid (LAL) was used to synthesize Al nanoparticles with a Q-switched Nd:YAG pulsed laser. Ascorbic acid was added as a carbon source to form a carbon layer outside the Al nanoparticle.
2：Sample Selection and Data Sources:
A bulk piece of Al metal was used as the target, and the liquid was made of methanol containing ascorbic acid.
3：List of Experimental Equipment and Materials:
Q-switched Nd:YAG pulsed laser, Al metal target, methanol, ascorbic acid.
4：Experimental Procedures and Operational Workflow:
The laser beam was focused on the Al target in the solution under an Ar atmosphere. The ablation was carried out with varying laser exposure times.
5：Data Analysis Methods:
TEM, XPS, and optical absorption spectroscopy were used to characterize the nanoparticles. Theoretical simulations based on the core-shell model were conducted to study the plasmonic response.
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