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Understanding flow patterns and coupled transport phenomena duringevaporation of droplets loaded with colloidal particles is central to designtechnical applications such as organizing proteins/DNA on a solid surface. Wereview recent reports on evaporating sessile droplets of colloidal suspensionson a solid surface. Starting from the classical mechanism of formation of aring-like deposit, we discuss the influence of several problem parameters.Notably, thermal or solutal Marangoni effect, particle size, particleconcentration, particle shape, substrate wettability, pH of the suspension etchave been found important in controlling the deposition pattern. The depositpattern complexity and shape have been attributed to the underlying coupledtransport phenomena during the evaporation. We discuss important regimes mapsreported for different types of deposit, which allow us to classify thedeposits and coupled physics. We also present studies that have demonstratedparticles sorting in an evaporating bi-dispersed colloidal suspensions on asolid surface. Finally, some remarks for the future research opportunities inthis arena are presented.

Recent Developments on Colloidal Deposits Obtained by Evaporation of Sessile Droplets on a Solid Surface