Indigenous medicinal plant of Ethiopia has been applied for the first time to investigate the synergistic influence of phytoconstituents in green copper nanoparticles (g-Cu NPs) towards the enhancement of antimicrobial properties of NPs. We report the green synthesis of Cu NPs using Hagenia abyssinica (Brace) JF. Gmel. leaf extract. The synthesized g-Cu NPs were characterized by UV-visible, UV-DRS, FT-IR, XRD, SEM, EDXA, TEM, HRTEM, and SAED techniques. The maximum absorbance, , was found to be 403 nm for g-Cu NPs due to surface plasmon resonance. The energy gap, of NPs, was found to be 2.19 eV. FTIR spectra confirmed the presence of polyphenols, tannins, and glycosides in the leaf extract of Hagenia abyssinica. The spectral band at 740 cm^-1 is a characteristic of interaction between Cu and biomolecules of the extract. The XRD analysis revealed that the g-Cu NPs appears to be more crystalline in nature. SEM and TEM micrographs showed a mix of spherical, hexagonal, triangular, cylindrical, and irregularly shaped Cu particles. The average particle size of NPs was found to be 34.76 nm by ImageJ analysis. EDX analysis confirmed the presence of copper in the g-Cu NPs. In addition, the SAED pattern of g-Cu NPs presented concentric circular patterns for 4 major planes of crystalline copper and its oxides. The experimental and calculated -spacing values of one of the crystal planes (111) were found to be 0.2432 nm and 0.2444 nm, respectively. The -spacing values of 0.2444 nm and 0.2040 nm correspond to d₁₁₁Cu₂O and d₁₁₁Cu lattice fringes, respectively. The antibacterial test conducted on E. coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Bacillus subtilis showed good zone of inhibitions 12.7, 12.7, 14.7, and 14.2 mm, respectively, proving potentiality of g-Cu NPs as a remedy for infectious diseases caused by tested pathogens.

中文翻译：

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利用药用植物白屈菜（Brace）JF合成绿色铜纳米粒子。梅尔 叶提取物：抗菌特性

埃塞俄比亚的本土药用植物已首次应用于研究绿色铜纳米颗粒（g-Cu NPs）中植物成分对增强NPs抗菌性能的协同影响。我们报告使用Hagenia abyssinica（Brace）JF的Cu NP的绿色合成。梅尔 叶提取物。合成的g-Cu NPs通过UV-可见，UV-DRS，FT-IR，XRD，SEM，EDXA，TEM，HRTEM和SAED技术表征。由于表面等离振子共振，发现g-Cu NPs的最大吸光度为403 nm。发现NP的能隙为2.19eV。FTIR光谱证实了哈奇尼亚（Hagenia abyssinica）叶提取物中存在多酚，单宁和糖苷。740厘米处的光谱带^-1是铜与提取物生物分子之间相互作用的特征。XRD分析表明，g-Cu NPs在性质上似乎更结晶。SEM和TEM显微照片显示出球形，六边形，三角形，圆柱形和不规则形状的Cu颗粒的混合物。通过ImageJ分析发现NP的平均粒径为34.76nm。EDX分析证实了g-Cu NP中存在铜。此外，g-Cu NPs的SAED图案在结晶铜及其氧化物的4个主平面上呈现出同心圆形图案。的实验和计算-发现晶面（111）中的一个的间隔值分别为0.2432 nm和0.2444纳米。的-的0.2444 nm和0.2040纳米对应于d间距值₁₁₁ Cu ₂ O和d ₁₁₁ Cu晶格条纹。对大肠杆菌，铜绿假单胞菌，金黄色葡萄球菌和枯草芽孢杆菌的抗菌测试分别显示了良好的抑菌圈，分别为12.7、12.7、14.7和14.2 mm，证明了g-Cu NP作为治疗由传染性疾病引起的传染病的潜力。测试病原体。