de Gennes Narrowing in Colloidal Discs

We studied the wave vector (q) dependence of relaxation time (τ) for different volume fractions of aqueous solutions of microspheres and microdiscs in concentrated regime. We observed characteristic peaks in τ(q) at certain q values. Such peaks indicate slow relaxations of structural rearrangements. These peaks match very well with the peaks in structure factor S(q) and radial distribution function g(r) calculations. This phenomena is called as de Gennes narrowing.