研究目的
To investigate experimentally GNP formation by PLAR using a Mo target and explore the relationship between synthesis conditions such as precursor concentration, ablation time, adding surfactant, and different targets.
研究成果
GNPs of < 10 nm dimension were successfully synthesized via PLAR of HAuCl4 solution using a Mo target. The size, shape, and distribution of GNPs can be controlled by precursor concentration, ablation time, and the addition of KI.
研究不足
The study is limited to the synthesis of GNPs using a Mo target and does not explore other target materials or laser parameters extensively.
1：Experimental Design and Method Selection
GNPs were synthesized by Nd:YAG pulsed laser-assisted reduction of aqueous [AuCl4]?. The laser beam was focused on a Mo target immersed in DI water, with the [AuCl4]? precursor solution added dropwise during the ablation process.
2：Sample Selection and Data Sources
HAuCl4 powder was dissolved in DI water to prepare the gold precursor solution. Samples were prepared with varying concentrations of HAuCl4 and different ablation times.
3：List of Experimental Equipment and Materials
Nd:YAG pulsed laser (λ = 1064 nm, pulse-width τ = 20 ns, 600 mJ average pulse energy, and 10 Hz repetition rate), Mo target (99.99% purity), HAuCl4 powder (Sigma Aldrich), DI water, KI solution.
4：Experimental Procedures and Operational Workflow
The laser beam was focused on the Mo target in DI water, with the [AuCl4]? solution added dropwise during laser exposure. The effect of precursor concentration, ablation time, and addition of KI was investigated.
5：Data Analysis Methods
UV–Vis absorption spectra, TEM images, and XRD patterns were used to characterize the synthesized nanoparticles.
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Perkin-Elmer UV–Vis spectrophotometer
Lambda25
Perkin-Elmer
Used to measure optical absorption spectra of the synthesized nanoparticles.
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Nd:YAG pulsed laser
Used for laser ablation of the Mo target in DI water to synthesize GNPs.
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Mo target
Used as the target material for laser ablation in the synthesis of GNPs.
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HAuCl4 powder
Sigma Aldrich
Used as the gold precursor for the synthesis of GNPs.
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Philips CM30 TEM apparatus
CM30
Philips
Used for TEM and SAED analyses of the synthesized nanoparticles.
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Phillips XPERT X-ray diffraction apparatus
XPERT
Phillips
Used to acquire XRD patterns of the synthesized nanoparticles.
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