Relation between growth dynamics and the spatial distribution of intrinsic defects in self-assembled colloidal crystal films

Abstract

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Toward a full understanding of the growth dynamics, optical response, and crystalline structure of self-assembled photonic colloidal crystal films

“…In this sense, we have recently shown that some important structural features of colloidal crystal films can be understood using a model that describes, in terms of the experimental variables, the deposition of the colloidal particle film onto a vertical or tilted flat substrate. 19 , 20 We confirmed that, for an evaporating colloidal suspension in which the evaporation velocity exceeds the sedimentation velocity, particles accumulate at the solvent-air interface and this gives rise to an increase of the thickness when analysed over long distances, as it has been previously proposed. 21 At the same time, we found that during evaporation the motion of the contact line resembles stick-slip motion and shifts downwards following an undulating dependence with time.…”

“…Other groups have recently reported thorough analyses of the variations of crystal thickness along the growth direction 21,24 or of the relation between crystal thickness and defect density or domain size, 25,26 such observations being in fair agreement with those reported in Refs. [19,20].…”

Evaporation-induced self-assembly of capillary cylindrical colloidal crystal in a face-centered cubic structure with controllable thickness

“…[21][22][23][24][25][26][27][28][29][30] These valuable results are also promising to produce high quality crystals inside capillaries. Among these parameters, evaporation temperature is most important due to its decision of evaporation rate of solvent and film growth rate, which can keep the balance of the rate of nucleus formation, particle transport, and crystallization.…”

Towards a full understanding of the growth dynamics and optical response of self-assembled photonic colloidal crystal films

“…18,19 To develop our model, we adapted deposition models previously developed to understand the structural properties of films formed from the drying of colloidal suspension drops on flat substrates. 20 From our model, whose full details can be found in ref.…”