[PDF] Photoacoustic study of Changes in Optical Properties of Colloids

What are the electric properties of colloids?

Lecture 40 Electric Properties of Colloids The particles of a colloidal solution are similarly charged either positively or negatively charged. Particles Do not cluster together to settle down due to repulsion. The charge on colloidal particles arises due to molecular electrolyte. E.g. As 2 S 3 has a negative charge.

What is the importance of colloidal surface properties?

Colloidal surface properties are therefore extremely important tounderstanding environmental function since colloidal aggregation and the sorption of tracepollutants, nutrients and pathogens are dependent on the nature of the colloid–colloid andcolloid–water interfaces [10–12].

What are colloids & how do they work?

Colloids are materials that display phase structures larger than those that display quantum effects (atomic and molecular) but small enough that the structures are sensitive to thermal fluctuations (smaller than 50 µm or the thickness of a hair), that is, colloids are affected by Brownian motion and are subject to diffusion.

What is the stability of a colloid?

Stability of Colloids: Colloidal particles collide with each other due to the Brownian motion, convection, gravity and other forces. Collisions may result in coagulation of the particles and destabilization of the colloid.