研究目的
Investigating the effect of oxidation time on the growth of copper oxide nanowires.
研究成果
The study established a direct relationship between oxidation time and the population density of copper oxide nanowires, with the longest nanowires observed at an oxidation time of 3 h. No significant increase in length was observed beyond this time. The nanowires grew perpendicular to the particle surfaces without entanglement or branching. The crystal structure of the nanowires was confirmed to be monoclinic.
研究不足
The study is limited to the effect of oxidation time on nanowire growth at a fixed temperature of 600°C. The scalability of the method and the potential for industrial application were not explored.
1：Experimental Design and Method Selection:
Thermal oxidation of spherical copper powder at 600°C under ambient air conditions with varying oxidation times (15 min to 4 h).
2：Sample Selection and Data Sources:
Spherical copper powder (Alfa Aesar) with a particle size range between 10–50 μm.
3：List of Experimental Equipment and Materials:
Box furnace, silicon substrate, Scanning Electron Microscopy (SEM - VEGA3), Energy dispersive Spectroscopy, Thermo gravimetric analysis (TGA), X-ray Diffraction (XRD - D8 Advanced Diffractometer).
4：Experimental Procedures and Operational Workflow:
Copper powder was evenly distributed on a flat silicon substrate and placed in a box furnace at 600°C for varying times. After oxidation, particles were scrapped from the substrate and analyzed using SEM, EDS, TGA, and XRD.
5：Data Analysis Methods:
SEM images were analyzed to measure nanowire length and population density. EDS confirmed the conversion of copper to copper oxide. TGA provided oxidation rate data. XRD identified the crystal structure of the nanowires.
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