Abstract
Dynamic laser speckle technique is a non-destructive optical method used for evaluating the activities of biological and non-biological specimens. Since stability of nanoparticles is one of the main concerns for its various applications, this work presents a novel approach of dynamic laser speckle technique to study the stability of colloidal silver nanoparticles in ethanol solution. Pulsed laser ablation process using nanosecond laser was used for synthesizing the nanoparticles. The size of silver nanoparticles was measured using Dynamic Light Scattering (DLS) technique. Statistical methods such as intensity structure function, inertia moment of time history of speckle patterns and two dimensional cross-correlation were used to extract the information regarding the stability of nanoparticles. The stability analysis of the nanoparticles was further confirmed using UV-Visible absorption spectroscopy.
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