Size distributions of chemically synthesized Ag nanocrystals

Details Size distributions of chemically synthesized Ag nanocrystals Size distributions of chemically synthesized Ag nanocrystals

2012-02-21

arxiv.org/abs/1202.4700v1

A. Th{\o}gersen, J. Bonsak, C. Huseby Fosli, G. Muntingh. Size distributions of chemically synthesized Ag nanocrystals. Journa

Physics

Condensed Matter

Materials Science

8 figures

Scientific paper

10.1063/1.3609077

Silver nanocrystals made by a chemical reduction of silver salts (AgNO$_3$) by sodium borohydride (NaBH$_4$) were studied using Transmission Electron Microscopy (TEM) and light scattering simulations. For various AgNO$_3$/NaBH$_4$ molar ratios, the size distributions of the nanocrystals were found to be approximately log-normal. In addition, a linear relation was found between the mean nanocrystal size and the molar ratio. In order to relate the size distribution of Ag nanocrystals of the various molar ratios to the scattering properties of Ag nanocrystals in solar cell devices, light scattering simulations of Ag nanocrystals in Si, SiO$_2$, SiN, and Al$_2$O$_3$ matrices were carried out using Mie Plot. These light scattering spectra for the individual nanocrystal sizes were combined into light scattering spectra for the fitted size distributions. The evolution of these scattering spectra with respect to an increasing mean nanocrystal size was then studied. From these findings, it is possible to find the molar ratio for which the corresponding nanocrystal size distribution has maximum scattering at a particular wavelength in the desired matrix.

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