Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India.
J Phys Chem B. 2012 Mar 29;116(12):3704-12. doi: 10.1021/jp203043k. Epub 2012 Mar 12.
In this work, we have synthesized different-sized silver nanoparticles in an aqueous-AOT reverse micellar system under the same condition by choosing different reduction processes. We chose two different reducing agents, glucose (mild) and sodium borohydride (strong). In the glucose reduction process, we obtained smaller size nanoparticles in comparison to the nanoparticles obtained in the borohydride reduction process under the same condition. Solvation dynamics study showed that reverse micellar aggregated structures were present after the nanoparticles' formation in a perturbed state. Nanoparticles inside the reverse micellar core were responsible for this perturbation. Larger size nanoparticles were triggering larger perturbation than the smaller size nanoparticles. These changes in perturbation were also reflected clearly in solvation dynamics and rotational relaxation measurements.
在这项工作中，我们通过选择不同的还原过程，在相同条件下在水-AOT 反胶束体系中合成了不同尺寸的银纳米粒子。我们选择了两种不同的还原剂，葡萄糖（温和）和硼氢化钠（强）。在葡萄糖还原过程中，与硼氢化钠还原过程相比，我们在相同条件下获得了更小尺寸的纳米粒子。溶剂化动力学研究表明，在纳米粒子形成后，在被扰动的状态下存在反胶束聚集结构。反胶束核内的纳米粒子是造成这种扰动的原因。较大尺寸的纳米粒子比较小尺寸的纳米粒子引起更大的扰动。这些在扰动方面的变化也在溶剂化动力学和旋转弛豫测量中得到了清晰的反映。
