AI Article Synopsis
- Brownian motion reveals details about the movement of molecules through collisions with colloid particles, such as polystyrene beads.
- In a water-ethanol mixture, these beads exhibit greater mobility than expected based on the liquid's viscosity, indicating an uneven distribution of the solvent at the microscopic level.
- The difference in mobility can be attributed to the interaction between the bead rotation and the characteristics of the inhomogeneous viscous solution.
Article Abstract
Brownian motion provides information regarding the microscopic geometry and motion of molecules, insofar as it occurs as a result of molecular collisions with a colloid particle. We found that the mobility of polystyrene beads from the Brownian motion in a water-ethanol mixture is larger than that predicted from the liquid shear viscosity. This indicates that mixing water and ethanol is inhomogeneous in micron-sized probe beads. The discrepancy between the mobility of Brownian motion and liquid mobility can be explained by the way the rotation of the beads in an inhomogeneous viscous solvent converts the translational movement.
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| http://dx.doi.org/10.1063/1.5007813 | DOI Listing |
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