<i>Stachytarpheta cayennensis</i>Aqueous Extract, a New Bioreactor towards Silver Nanoparticles for Biomedical Applications

• 作者: Agnes Antoinette Ntoumba Carsten Schlüsener Cecile Okalla Ebongue Christian Chick Nanga Christoph Janiak Edmond Tchoumbi Emmanuel Albert Mpondo Mpondo Etienne Elanga Evrard-Rudy Njike Loudang Francois Eya’ane Meva Joel Olivier Avom Mbeng Moise Henri Julien Nko’o Phillipe Belle Ebanda Kedi ülkü K?k?am-Demir Vandi Deli
• 来源期刊: 生物材料与纳米技术(英文)
• 学科: 化学
• 关键词: Silver Nanoparticles Stachytarpheta cayennensis Size and Strain ANTI-OXIDANT ANTI-INFLAMMATION
• 年，卷（期）: 2019,（2）
• 页码范围: 102-119
• 页数: 18页
• 分类号: O6

摘要

This study reports the preparation and characterization of silver nanoparticles synthesized by the mediation of the plant weed Stachytarpheta cayennensis through solution method. Ultraviolet visible spectroscopy (UV-Vis) determines the presence of nanoparticles in the solution. Infrared spectroscopy (IR) proves organic molecules at the particles interface. Powder X-ray diffraction (PXRD) provides phase composition and crystallinity. Shape was showed by scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX) demonstrated the elemental mapping of the silver nanoparticles. Hydrogen peroxide scavenging and phosphomolybdenum antioxidant assays, egg albumin denaturation anti-inflammation study, and the formation mechanism complete the study. The particles have been found composed of pure silver Ag and silver chloride AgCl nanocrystallites. The average crystallite sizes were found to be 13 nm and 20 nm for Ag and AgCl respectively. A Rietveld refinement based XRD pattern data followed by Williamson-Hall plot allows a size and strain analysis. Based on SEM, spherical agglomerates materials were formed and EDX proved the presence of Cl- ions. The reaction formation mechanism of Ag and AgCl is proposed to be simultaneous and competitive. The silver nanoparticles moderately inhibit the denaturation of egg albumin and exhibit antioxidant action;hence, the nanoparticles could be considered as a potential source for biomedical applications.