Abstract: (5235 Views)
In this paper, we measure the velocity of nanoparticles suspended in a fluid by using the "zero-crossing" of the intensity fluctuation of laser speckles. The speckle patterns are formed by illuminating the CdZnS nanoparticles suspended in ethanol with a Gaussian laser beam. The zero crossing number of scattered speckle pattern is detected in diffraction field by a circular aperture in front of power meter. The velocity of nanoparticles is measured by counting the zero crossing of the spatially integrated speckle intensity fluctuation in different temperature.
Type of Study:
Research |
Subject:
Special