Characterization of the silver nanoparticles in solution will begin with the determination of their SERS activity.  In addition, the stability of the nanoparticles will be tested using zeta potential in which pH and ionic strength are varied, and their resulting effect on surface charge of nanoparticles investigated.  Furthermore, the electrostatic repulsion, van der Waals attractions and the effect of steric interactions will be studied.  The effect of pH and concentration on zeta-potential will be optimized to maximize solution stability.  To complement the zeta potential data Monte Carlo simulations will be used to determine the meta-stable state (the aggregation dynamics, essentially) of these nanoparticles, in addition to their size and shape.  By combining theoretical insights with data collected experimentally, the nature of the stability of the silver nanoparticles may be better understood.

Investigation of stability in Ag nanoparticle solutions using Monte Carlo simulations and zeta-sizer measurements

243rd National Meeting (2012)

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