研究目的
Investigating the structural variations during aging of particles synthesized by laser ablation of copper in water, focusing on the effects of pulse duration, wavelength, and energy on the formation, morphology change, and aging of CuO and Cu2O particles.
研究成果
The study demonstrated that laser ablation of copper in water produces CuO and Cu2O particles whose morphology and size are significantly influenced by the pulse duration and wavelength. Ultra-short pulses resulted in smaller particles with narrower size distributions. The particles showed rapid oxidation and stable morphology over time, indicating potential for controlled synthesis of nanoparticles with specific properties for various applications.
研究不足
The study is limited by the specific conditions of laser ablation (pulse duration, wavelength, and energy) and the use of distilled water as the ablation medium. The effects of other solvents or ablation conditions were not explored. Additionally, the study focuses on short-term aging effects, and long-term stability of the particles was not extensively studied.
1：Experimental Design and Method Selection:
The study involved laser ablation of copper in distilled water using pulses of different durations (5 ns, 200 ps, 30 fs), wavelengths (1064 nm, 355 nm, 800 nm), and energies. The morphology, size, and distribution of the resulting particles were analyzed using SEM, XRD, and EDS.
2：Sample Selection and Data Sources:
A bulk copper target with
3：99% purity was used. The colloidal solutions obtained were analyzed at different periods after ablation to study aging effects. List of Experimental Equipment and Materials:
A regenerative amplifier (Spitfire Ace, Spectra Physics) for fs and ps pulses, a Nd:YAG laser (Q-Smart, Coherent) for ns pulses, SEM (S-4800, Hitachi), XRD (D8 Discover, Bruker AXS), and EDS (S-4800, Hitachi).
4：Experimental Procedures and Operational Workflow:
The copper target was ablated in distilled water, and the resulting colloidal solutions were analyzed immediately after ablation and over time to observe aging effects.
5：Data Analysis Methods:
The size, nanostructure, distribution, and morphology of particles were analyzed using SEM. Chemical composition and microscopic structure were analyzed by XRD and EDS. Absorption spectroscopy was used to determine bandgaps and SPRs of particles.
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