We have reported the preparation and characterization of both pure and Cu²⁺ doped Cr₂O₃ nanoparticles with different dopant concentrations by the simple, cost-effective microwave-assisted method. As-prepared samples have undergone various characterizations to get an insight into the Cr₂O₃ nanoparticles. The XRD pattern showed the rhombohedral phase structure of Cr₂O₃ with an average particle size of ±14 nm. The surface and morphology analysis (FESEM and TEM) revealed a nearly spherical shape with an average particle size of 30–50 nm and the presence of the elemental composition of Cr and Cu was confirmed by the EDAX spectrum. The optical properties (UV–Vis and PL spectra) of Cr₂O₃ nanostructures were also studied, and results were found to support our further studies. Finally, electrical and dielectric characterization showed enhanced electrical conductivity concerning temperature and frequency.

我们已经报道了通过简单、经济高效的微波辅助方法制备和表征具有不同掺杂浓度的纯和 Cu ²⁺掺杂的 Cr ₂ O ₃纳米颗粒。所制备的样品经过各种表征以深入了​​解 Cr ₂ O ₃纳米颗粒。XRD图谱显示Cr ₂ O ₃的菱形相结构平均粒径为±14 nm。表面和形态分析（FESEM 和 TEM）显示近似球形，平均粒径为 30-50 nm，EDAX 光谱证实了 Cr 和 Cu 元素组成的存在。还研究了 Cr ₂ O ₃纳米结构的光学特性（UV-Vis 和 PL 光谱），发现结果支持我们的进一步研究。最后，电学和介电特性显示出与温度和频率有关的增强的电导率。