Desiccating colloidal sessile drop: dynamics of shape and concentration
TLDR
In this paper, a simple model is proposed to describe temporal dynamics of both the shape of the drop and the volume fraction of the colloidal particles inside the drop, and the concentration dependence of the viscosity is taken into account.Abstract:
Using lubrication theory, drying processes of sessile colloidal droplets on a solid substrate are studied. A simple model is proposed to describe temporal dynamics of both the shape of the drop and the volume fraction of the colloidal particles inside the drop. The concentration dependence of the viscosity is taken into account. It is shown that the final shapes of the drops depend on both the initial volume fraction of the colloidal particles and the capillary number. The results of our simulations are in a reasonable agreement with the published experimental data. Computations for the drops of aqueous solution of human serum albumin are presented.read more
Citations
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Transport and deposition patterns in drying sessile droplets
TL;DR: The literature on drying sessile droplets and deposition of suspended material is reviewed including the simple explanation of the “coffee ring” deposit given by Deegan et al. as discussed by the authors.
Journal ArticleDOI
Evaporation of a Droplet: From physics to applications
Duyang Zang,Sujata Tarafdar,Yuri Yu. Tarasevich,Moutushi Dutta Choudhury,Moutushi Dutta Choudhury,Tapati Dutta,Tapati Dutta +6 more
TL;DR: In this article, the mass transfer process, the formation and evolution of phase fronts and the identification of mechanisms of pattern formation are discussed, and several potential directions for future research in this area are discussed.
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A new label-free technique for analysing evaporation induced self-assembly of viral nanoparticles based on enhanced dark-field optical imaging
TL;DR: In this paper, a bio-nanoparticle with complex shape (T4 bacteriophage) that self-assembles on glass substrates upon drying was developed, and the fluid flow regime during the drying process, as well as the final self-assembled structures, were studied using dark-field microscopy, while phage diffusion was analysed by tracking of the phage nanoparticles in the bulk solutions.
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Patterned deposition at moving contact lines
TL;DR: A number of recent experiments and modelling approaches are reviewed with a particular focus on mesoscopic hydrodynamic long-wave models and the conclusion highlights open question and speculates about future developments.
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Desiccation of a sessile drop of blood: Cracks, folds formation and delamination
TL;DR: In this article, the dynamics of fracture, the mean space cracking and delamination are examined, and the initial crack spacing appears to be correctly predicted by the Allain and Limat model implemented for open geometries.
References
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Contact line deposits in an evaporating drop
TL;DR: A theory is described that predicts the flow velocity, the rate of growth of the ring, and the distribution of solute within the drop that is driven by the loss of solvent by evaporation and the geometrical constraint that the drop maintain an equilibrium droplet shape with a fixed boundary.
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Nonlinear stability of evaporating/condensing liquid films
TL;DR: In this article, the authors consider horizontal static liquid layers on planar solid boundaries and analyse their instabilities, including the effects of mass loss (or gain) and non-equilibrium thermodynamic effects.
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Evaporative deposition patterns: spatial dimensions of the deposit.
TL;DR: It is shown that the observed dependence of the deposit dimensions on the experimental parameters can indeed be attributed to the finite dimensions of the solute particles.
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Analysis of the microfluid flow in an evaporating sessile droplet.
Hua Hu,Ronald G. Larson +1 more
TL;DR: A finite element algorithm is developed to solve simultaneously the vapor concentration and flow field in the droplet under conditions of slow evaporation and confirms the accuracy of the lubrication solution.
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Particle convection in an evaporating colloidal droplet
TL;DR: In this article, it was shown that either an outward flow toward the contact line or an inward flow towards the center of the droplet can be induced, depending on the evaporative driving force.