研究目的
Investigating the plasmonic properties of metallic nanoparticles with different morphological properties and comparing experimental results with theoretical simulations.
研究成果
Cu nanoparticle thin films produced by PLD technique showed that as the gas pressure increases, both size and density of the particles decrease, and the LSPR peak shifts towards shorter wavelengths. Theoretical simulations using BEM were consistent with experimental results, confirming the positions of LSPR peaks. These findings suggest that Cu nanoparticles can be used in thin film solar cells to absorb photons at specific wavelengths, with the LSPR peaks adjustable by varying the Ar gas pressure in the PLD technique.
研究不足
The BEM simulation program performs calculations for a single particle in uniform shape and ignores the size distribution, leading to narrower LSPR bands compared to experimental results.
1：Experimental Design and Method Selection:
Pulse Laser Deposition (PLD) technique with a nanosecond Nd:YAG laser system was used to grow plasmonic metal-nanoparticles on microscope slides and silicon wafers. The morphology was investigated by Atomic Force Microscopy (AFM), and UV-vis spectra were used to observe Localised Surface Plasmon Resonance (LSPR) bands.
2：Sample Selection and Data Sources:
Cu nanoparticle thin films were grown on p-silicon wafer and microscopic glass substrates.
3：List of Experimental Equipment and Materials:
Nd:YAG laser system, AFM, UV-vis spectrometer, Cu target (
4：95% pure), Ar gas. Experimental Procedures and Operational Workflow:
Cleaning of substrates, ablation of Cu target under different Ar gas pressures, examination of nanoparticle morphology by AFM, and obtaining absorption spectrum by UV-vis spectrometer.
5：Data Analysis Methods:
Comparison of experimental LSPR peaks with theoretical results obtained using Boundary Element Method (BEM) simulation.
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