DDA-Based Simulation of UV-vis Extinction Spectra of Ag Nanorods Synthesized Through Seed-Mediated Growth Process

作者：Sarkar Priyanka; Bhui Dipak K; Bar Harekrishna; Sahoo Gobinda P; Samanta Sadhan; Pyne Santanu; Misra Ajay^*

来源：Plasmonics, 2011, 6(1): 43-51.

DOI：10.1007/s11468-010-9167-2

• Silver nanostructure
• Seed-mediated growth
• Hydroxypropyl methyl cellulose (HPMC)
• SPR HR-TEM
• DDA

Present investigation demonstrates a very simple seed-mediated route for the synthesis of silver nanorods in aqueous solution. Central to the concept of seed-mediated growth of nanoparticles is that small nanoparticle seeds serve as nucleation centres to grow nanoparticles to a desired size and shape. Hydroxypropyl methyl cellulose (HPMC) has been used as soft template for one-dimensional growth of silver particles. Morphological, structural and spectral changes that are associated with the seed-mediated growth of the nanoparticles in presence of HPMC are characterized using UV-vis and HR-TEM spectroscopic study. Simulation of UV-vis extinction spectra of our synthesized silver nanorods has been carried out using discrete dipole approximation methodology. The broad red-shifted longitudinal extinction band of green-coloured silver sol has been explained, due to the presence of silver nanorods of different aspect ratios.

• 出版日期2011-3