Open Access NANO EXPRESS

Aqueous-Phase Synthesis of Silver Nanodiscs and Nanorods in Methyl Cellulose Matrix: Photophysical Study and Simulation of UV–Vis Extinction Spectra Using DDA Method

Priyanka Sarkar, Dipak Kumar Bhui, Harekrishna Bar, Gobinda Prasad Sahoo, Sadhan Samanta, Santanu Pyne and Ajay Misra*

Author Affiliations

Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102, West Bengal, India

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Nanoscale Research Letters 2010, 5:1611-1618  doi:10.1007/s11671-010-9684-0

Published: 18 July 2010

Abstract

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.

Keywords:
Silver nanostructure; Seed-mediated growth; Methyl Cellulose (MC); SPR; HR-TEM; Discrete dipole approximation (DDA)