Self-assembly of colloidal sulfur particles on a glass surface from evaporating sessile drops: influence of different salts

Paria, Santanu; Chaudhuri, Rajib Ghosh; Jason, Naveen Noah

doi:10.1039/c4nj01267d

Cited by 31 publications

(27 citation statements)

References 46 publications

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“…The crystallization patterns of salts in drying droplets show a wide variety of intricate patterns [8][9][10]3]. Sodium sulphate and sodium chloride in high viscosity solutions are popular candidates for such studies.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale patterns formed by sodium sulphate in a drying droplet of gelatin

Roy

Choudhuri

Dutta

et al. 2015

Applied Surface Science

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a b s t r a c tWe present a study of patterns, formed in drying drops of aqueous gelatin solution containing sodium sulphate. The patterns are highly complex, consisting of a hierarchical sequence of rings which form concentric bands as well as dendritic crystalline aggregates. When the preparation of the complex fluid is done by mixing an aqueous solution of the salt with an aqueous solution of gelatin prepared separately, another feature is observed in the pattern on the dried out drop. This is a viscous fingering pattern, superposed on the series of rings. We try to explain the origin of these two features from a simple physical approach.

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Section: Introductionmentioning

confidence: 99%

Multi-scale patterns formed by sodium sulphate in a drying droplet of gelatin

Roy

Choudhuri

Dutta

et al. 2015

Applied Surface Science

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“…As pointed out by some authors, protein solutions can be influenced by salt, however, to what extent does the content of salt affects the fibrillary mixture is yet to be explored. Therefore, the main aims of the present study were to investigate the dependence of the interactions between LAF and MNPs on different concentration ratios of protein and nanoparticles and elucidate how the addition of salt affects the morphology of the mixture.…”

Section: Introductionmentioning

confidence: 99%

Effect of the concentration of protein and nanoparticles on the structure of biohybrid nanocomposites

et al. 2019

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We present colloidal nanocomposites formed by incorporating magnetite Fe3O4 nanoparticles (MNPs) with lysozyme amyloid fibrils (LAFs). Preparation of two types of solutions, with and without addition of salt, was carried out to elucidate the structure of MNPs‐incorporated fibrillary nanocomposites and to study the effect of the presence of salt on the stability of the nanocomposites. The structural morphology of the LAFs and their interaction with MNPs were analyzed by atomic force microscopy and small‐angle x‐ray scattering measurements. The results indicate that conformational properties of the fibrils are dependent on the concentration of protein, and the precise ratio of the concentration of the protein and MNPs is crucially important for the stability of the fibrillary nanocomposites. Our results confirm that despite the change in fibrillary morphology induced by the varying concentration of the protein, the adsorption of MNPs on the surface of LAF is morphologically independent. Moreover, most importantly, the samples containing salt have excellent stability for up to 1 year of shelf‐life.

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“…A particle-surfactant mixture thus can modulate the capillary flow [18,107,152]. Colloidal sulphur with salt self-assembles into a wide variety of patterns, depending on conditions [158]. Different sodium salts are formed in situ, using different acids-monobasic, dibasic, and tribasic.…”

Section: Evaporation Of a Complex Fluid Drop Containing Saltmentioning

confidence: 99%

Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

Tarafdar

Tarasevich

Choudhury

et al. 2018

Advances in Condensed Matter Physics

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This review is devoted to the simple process of drying a multicomponent droplet of a complex fluid which may contain salt or other inclusions. These processes provide a fascinating subject for study. The explanation of the rich variety of patterns formed is not only an academic challenge but also a problem of practical importance, as applications are growing in medical diagnosis and improvement of coating/printing technology. The fundamental scientific problem is the study of the mechanism of microand nanoparticle self-organization in open systems. The specific fundamental problems to be solved, related to this system, are the investigation of the mass transfer processes, the formation and evolution of phase fronts, and the identification of mechanisms of pattern formation. The drops of liquid containing dissolved substances and suspended particles are assumed to be drying on a horizontal solid insoluble smooth substrate. The chemical composition and macroscopic properties of the complex fluid, the concentration and nature of the salt, the surface energy of the substrate, and the interaction between the fluid and substrate which determines the wetting all affect the final morphology of the dried film. The range of our study encompasses the fully wetting case with zero contact angle between the fluid and substrate to the case where the drop is levitated in space, so there is no contact with a substrate and angle of contact can be considered as 180 ∘ .

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Self-assembly of colloidal sulfur particles on a glass surface from evaporating sessile drops: influence of different salts

Cited by 31 publications

References 46 publications

Multi-scale patterns formed by sodium sulphate in a drying droplet of gelatin

Multi-scale patterns formed by sodium sulphate in a drying droplet of gelatin

Effect of the concentration of protein and nanoparticles on the structure of biohybrid nanocomposites

Droplet Drying Patterns on Solid Substrates: From Hydrophilic to Superhydrophobic Contact to Levitating Drops

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