研究目的
Investigating the effects of ultrasonic-assisted laser ablation in liquid (LAL) on the fabrication of gold and silver nanoparticles, including their size, morphology, and stability.
研究成果
Ultrasonic-assisted LAL significantly enhances the fabrication rate of AuNPs and AgNPs, producing smaller and more separated nanoparticles with improved stability. The method also allows for a novel approach to estimating nanoparticle concentration by analyzing crater volumes on the target plates. This technique shows promise for the efficient and environmentally friendly synthesis of metal nanoparticles with superior properties.
研究不足
The study primarily focuses on the effects of ultrasonic assistance on LAL for nanoparticle fabrication. The comparison is limited to gold and silver nanoparticles, and the method's applicability to other metals or materials is not explored. The concentration estimation method, while novel, may require further validation for broader application.
1：Experimental Design and Method Selection:
Utilized ultrasonic-assisted LAL to fabricate AuNPs and AgNPs. The process involved ablating gold and silver plates with a Nd:YAG laser in distilled water, with and without an ultrasonic field.
2：Sample Selection and Data Sources:
High-purity gold and silver plates were used as targets. The fabricated nanoparticle solutions were analyzed using UV-vis spectroscopy, TEM with EDS, ζ-potential measurement, SEM, and laser microscopy.
3：List of Experimental Equipment and Materials:
Nd:YAG laser (Spectra-Physics Quanta-Ray INDI-40-10), ultrasonic bath (ASU-2, AS ONE Company), UV-vis spectrometer (V-550, Jasco Corporation), TEM (JEM-2100Plus, Japan Electronic Co., Ltd.), SEM (S-4300, Hitachi), laser microscope (LSM5PASCAL, Carl Zeiss), and high-resolution spectrometer (HR4000, Ocean Optics Inc.).
4：Experimental Procedures and Operational Workflow:
The metal plates were ablated in distilled water with and without an ultrasonic field for different durations. The resulting solutions were then characterized using the aforementioned techniques.
5：Data Analysis Methods:
The morphology and size of nanoparticles were analyzed using TEM and SEM. The optical properties were studied using UV-vis spectroscopy. The stability of the colloidal solutions was assessed via ζ-potential measurements. The volume of craters on the silver plates was calculated using MATLAB to estimate nanoparticle concentration.
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