Plant-derived nanoparticles have multi-functionalities owing to their ecological origin and biocompatible nature. A novel and stable silver nanoparticle (AgNP) was reported here using Cyanthillium cinereum (C. cinereum) as a reducing as well as capping agent by rapid microwave-assisted green method. The synthesized nanoparticles revealed their crystalline and spherical nature with an average size of 19.25 ± 0.44 nm in HR-TEM analysis. The excitation of electrons from occupied d-bands to states above the Fermi level while employing photoluminescence studies of AgNP indicated their awesome optical properties. Rapid decomposition of dangerous organic dyes like methylene blue and fuchsine in the catalytic presence of AgNP was evidenced from simple UV-visible spectral analysis. In vitro antioxidant potential assessed by DPPH assay indicated an IC50 value of 40.80 ± 0.14 μg/mL for the new AgNP. A substantial control on the growth of pathogenic bacteria such as Staphylococcus aureus and Klebsiella pneumonia can be achieved by synthesized nanoparticles as demonstrated by the well diffusion method. AgNP was also functioned as a non-enzymatic electrochemical sensor with a sharp oxidation peak with peak potentials at 0.366 V and it has a wide application as a bio sensor in neurobiology especially in the detection of neurotransmitters like dopamine with high sensitivity.

中文翻译：

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用于光学、催化、生物和电化学应用的银纳米粒子的微波辅助绿色合成。

由于其生态起源和生物相容性，植物衍生的纳米粒子具有多种功能。通过快速微波辅助绿色方法，使用 Cyanthillium cinereum (C. cinereum) 作为还原剂和封端剂，报道了一种新型稳定的银纳米颗粒 (AgNP)。合成的纳米粒子在 HR-TEM 分析中显示出它们的结晶和球形性质，平均尺寸为 19.25 ± 0.44 nm。在使用 AgNP 的光致发光研究时，电子从占据的 d 带激发到费米能级以上的状态，表明它们具有令人敬畏的光学特性。简单的紫外-可见光谱分析证明，在 AgNP 的催化存在下，危险的有机染料（如亚甲蓝和品红）可快速分解。通过 DPPH 测定评估的体外抗氧化潜力表明新 AgNP 的 IC50 值为 40.80 ± 0.14 μg/mL。如孔扩散法所证明的，通过合成纳米颗粒可以实现对金黄色葡萄球菌和肺炎克雷伯菌等病原菌生长的实质性控制。AgNP 还用作非酶电化学传感器，其氧化峰尖锐，峰值电位为 0.366 V，在神经生物学中作为生物传感器具有广泛的应用，特别是在检测多巴胺等高灵敏度神经递质方面。