Centro de Nanociencia y Nanotecnologia, Universidad de las Fuerzas Armadas (ESPE), Sangolqui, Ecuador.
Department of Chemistry, Kolhan University, Chaibasa, Jharkhand 833202, India.
Bioinorg Chem Appl. 2014;2014:784268. doi: 10.1155/2014/784268. Epub 2014 Jan 22.
A novel approach was applied to synthesize silver nanoparticles using starch under sonication. Colloidal silver nanoparticles solution exhibited an increase of absorption from 420 to 440 nm with increase starch quantity. Transmission electron microscopy followed by selected area electron diffraction pattern analysis indicated the formation of spherical, polydispersed, amorphous, silver nanoparticles of diameter ranging from 23 to 97 nm with mean particle size of 45.6 nm. Selected area electron diffraction (SAED) confirmed partial crystalline and amorphous nature of silver nanoparticles. Silver nanoparticles synthesized in this manner can be used for synthesis of 2-aryl substituted benzimidazoles which have numerous biomedical applications. The optimized reaction conditions include 10 ml of 1 mM AgNO3, 25 mg starch, 11 pH range, and sonication for 20 min at room temperature.
采用一种新方法，在超声作用下用淀粉合成了银纳米粒子。胶体银纳米粒子溶液的吸收从 420nm 增加到 440nm，随着淀粉数量的增加而增加。透射电子显微镜和选区电子衍射图谱分析表明，形成了球形、多分散、非晶态、直径为 23 至 97nm 的银纳米粒子，平均粒径为 45.6nm。选区电子衍射（SAED）证实了银纳米粒子的部分结晶和非晶态性质。以这种方式合成的银纳米粒子可用于合成具有多种生物医学应用的 2-芳基取代苯并咪唑。优化的反应条件包括 10ml1mM 的 AgNO3、25mg 淀粉、11 的 pH 值范围和在室温下超声 20 分钟。
