Sarkar Priyanka, Bhui Dipak Kumar, Bar Harekrishna, Sahoo Gobinda Prasad, Samanta Sadhan, Pyne Santanu, Misra Ajay
Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal India.
Nanoscale Res Lett. 2010 Jul 18;5(10):1611-8. doi: 10.1007/s11671-010-9684-0.
We present a very simple and effective way for the synthesis of tunable coloured silver sols having different morphologies. The procedure is based on the seed-mediated growth approach where methyl cellulose (MC) has been used as soft-template in the growth solution. Nanostructures of varying morphologies as well as colour of the silver sols are controlled by altering the concentration of citrate in the growth solution. Similar to the polymers in the solution, citrate ions also dynamically adsorbed on the growing silver nanoparticles and promote one (1-D) and two-dimensional (2-D) growth of nanoparticles. Silver nanostructures are characterized using UV-vis and HR-TEM spectroscopic study. Simulation of the UV-vis extinction spectra of our synthesized silver nanostructures has been carried out using discrete dipole approximation (DDA) method.
我们提出了一种非常简单且有效的方法来合成具有不同形态的可调谐彩色银溶胶。该方法基于种子介导生长法，其中甲基纤维素（MC）在生长溶液中用作软模板。通过改变生长溶液中柠檬酸盐的浓度，可以控制银溶胶的不同形态纳米结构以及颜色。与溶液中的聚合物类似，柠檬酸根离子也动态吸附在生长的银纳米颗粒上，并促进纳米颗粒的一维（1-D）和二维（2-D）生长。使用紫外可见光谱和高分辨率透射电子显微镜（HR-TEM）对银纳米结构进行表征。利用离散偶极近似（DDA）方法对我们合成的银纳米结构的紫外可见消光光谱进行了模拟。
