Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India.
Colloids Surf B Biointerfaces. 2011 Aug 1;86(1):87-92. doi: 10.1016/j.colsurfb.2011.03.025. Epub 2011 Apr 13.
This paper describes a simple preparation of single-crystalline Ag-nanoparticles including plates, and wires in water by truncated triangular particles for the first time during the reduction of [Ag(NH₃)₂]⁺ complex with glucose at room temperature. Silver particles were characterized by means of the conventional transmission electron microscopy (TEM) and UV-VIS spectroscopy. Cetyltrimethylammonium bromide, CTAB, plays a number of roles during the redox process by solubilizing the reactants, controlling the nucleation and/or growth of nanoparticles, stabilizing the thus-prepared Ag-nanoparticles and minimizing the formation of Ag₂O, AgCl, and AgBr precipitates. It was found that the rate constant and absorbance of silver nanoparticles were sigmoidal to the concentration of silver nitrate.
本文首次描述了一种在室温下用葡萄糖还原[Ag(NH₃)₂]⁺络合物时，通过截断的三角形颗粒在水中制备包括板状和线状的单晶 Ag 纳米粒子的简单方法。通过常规透射电子显微镜（TEM）和紫外可见光谱对银颗粒进行了表征。十六烷基三甲基溴化铵（CTAB）在氧化还原过程中通过溶解反应物、控制纳米颗粒的成核和/或生长、稳定所制备的 Ag 纳米颗粒以及最小化 Ag₂O、AgCl 和 AgBr 沉淀的形成发挥了多种作用。研究发现，银纳米颗粒的速率常数和吸光度与硝酸银的浓度呈 S 型关系。
