十二烷基硫酸钠调控合成梭形银纳米粒子

Shape-Controlled Synthesis of Shuttle-like Silver Nanoparticles by SDS

摘要:

在十二烷基硫酸钠(SDS)溶液中，用柠檬酸(CA)还原硝酸银合成梭形银纳米粒子。紫外-可见光谱(Uv-vis)和透射电镜(TEM)实验结果表明，在固定SDS/CA质量比为50: 50条件下，所制备的银粒子两头尖，中间宽，呈梭形结构。梭形银粒子的形成主要是SDS在不同晶面的吸附使得晶面的生长速率不同所致。SDS在梭形银粒子的形成过程中不是起模板作用，而是作为吸附剂和分散剂

Abstract:

Shuttle-like silver nanoparticles were synthesized in sodium dodecyl sulfate (SDS) solution through reduction of silver nitrate with citric acid (CA). Transmission electron microscopy (TEM) and UV-vis absorption spectroscopy were used to characterize the obtained products. Results show that the silver nanoparticles are shuttle-like when the mass ratio of SDS to CA is fixed at 50:50. The formation of shuttle-like structure is mainly caused by the different growth rates of crystal faces because of SDS adsorption. SDS might play the adsorbent and dispersant roles rather than the template role in the formation process of shuttle-like nanoparticles