Drying silica-nanofluid droplets

Mulka, R.; Kujawska, A.; Zajączkowski, Bartosz; Mancin, Simone; Buschmann, Matthias

doi:10.1016/j.colsurfa.2021.126730

Cited by 13 publications

(6 citation statements)

References 34 publications

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“…The second drying stage occurs when most of the liquid in the droplet evaporates, and the contact line starts to recede. 29 Due to nonuniform evaporative flux, the liquids from the edge of the droplet dry at a faster rate than the interior of the droplet. Thus, the volume evaporated from the edges is replaced with fluid from the bulk of the droplet.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Drying-Induced Flash Nanoprecipitation in a Sessile Drop: A Route to Synthesize Polymeric Nanoparticles

Manohar,

Basavaraj

et al. 2024

Langmuir

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Section: ■ Results and Discussionmentioning

confidence: 99%

Drying-Induced Flash Nanoprecipitation in a Sessile Drop: A Route to Synthesize Polymeric Nanoparticles

Manohar,

Basavaraj

et al. 2024

Langmuir

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“…Furthermore, experiments with higher amount of solution (50 µL), covering the whole substrates were made to determine the difference in growth mode shown in Figure 6 and Figure 7 for ethanol ( 2 –DrE–2) and acetonitrile ( 2 –DrA–2), respectively. As can be seen from the microscopy image in Figure 6 a block-like structures separated by cracks are observed on the edge of the substrate which is attributed to the removal of solvent residuals during the drying process, and which may lead to hierarchical crack networks [ 60 ]. This phenomenon was also observed for annealed films of bismuth oxide [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Deposition of Nanosized Amino Acid Functionalized Bismuth Oxido Clusters on Gold Surfaces

et al. 2022

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Bismuth compounds are of growing interest with regard to potential applications in catalysis, medicine, and electronics, for which their environmentally benign nature is one of the key factors. One thing that currently hampers the further development of bismuth oxido-based materials, however, is the often low solubility of the precursors, which makes targeted immobilisation on substrates challenging. We present an approach towards the solubilisation of bismuth oxido clusters by introducing an amino carboxylate as a functional group. For this purpose, the bismuth oxido cluster [Bi38O45(NO3)20(dmso)28](NO3)4·4dmso (dmso = dimethyl sulfoxide) was reacted with the sodium salt of tert-butyloxycabonyl (Boc)-protected phenylalanine (L-Phe) to obtain the soluble and chiral nanocluster [Bi38O45(Boc–Phe–O)24(dmso)9]. The exchange of the nitrates by the amino carboxylates was proven by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, as well as elemental analysis and X-ray photoemission spectroscopy. The solubility of the bismuth oxido cluster in a protic as well as an aprotic polar organic solvent and the growth mode of the clusters upon spin, dip, and drop coating on gold surfaces were studied by a variety of microscopy, as well as spectroscopic techniques. In all cases, the bismuth oxido clusters form crystalline agglomerations with size, height, and distribution on the substrate that can be controlled by the choice of the solvent and of the deposition method.

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“…They are actively used as additives in paint products, anti-corrosion, antifriction and hydrophobic coatings, and rubber products. SiO 2 nanoparticles are used as additives for concretes, dry building mixtures, heat-resistant and heat-insulating materials [36].…”

Section: Introductionmentioning

confidence: 99%

Evaporation of Suspended Nanofluid (SiO$$_{2}$$/Water) Droplets: Experimental Results and Modelling

et al. 2023

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The results of experimental studies and modelling of the evaporation of suspended water droplets containing silicon dioxide SiO2 nanoparticles at mass fractions 0.02 and 0.07 are presented. The experimental results are analysed using the previously developed model for multicomponent droplet heating and evaporation. In this model droplets are assumed to be spherical and the analytical solutions to the heat transfer and species diffusion equations are incorporated into the numerical code. They are used at each timestep of the calculations. Silicon dioxide nanoparticles are considered to be a non-evaporating component. It is demonstrated that both experimental and predicted values of droplet diameters to the power 1.5 decrease almost linearly with time, except at the beginning and the final stages of the evaporation process, and are only weakly affected by the presence of nanoparticles. At the final point in this process, the effect of nanoparticles becomes dominant when their mass fraction at Evaporation of suspended nanofluid (SiO 2 /water) droplets the droplet surface reaches about 40% and a cenosphere-like structure is formed. Both predicted and observed droplet surface temperatures rapidly decrease during the initial stage of droplet evaporation. After about t = 100 s the predicted surface temperature remains almost constant while its experimentally observed values increase with time. This might be related to a decrease in the temperature of ambient air in the vicinity of droplets, not taken into account in the model. Both observed and predicted values of the mass fraction of silicon dioxide at the droplet surfaces are shown to increase with time until they reach about 0.4.

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Drying silica-nanofluid droplets

Cited by 13 publications

References 34 publications

Drying-Induced Flash Nanoprecipitation in a Sessile Drop: A Route to Synthesize Polymeric Nanoparticles

Drying-Induced Flash Nanoprecipitation in a Sessile Drop: A Route to Synthesize Polymeric Nanoparticles

Deposition of Nanosized Amino Acid Functionalized Bismuth Oxido Clusters on Gold Surfaces

Evaporation of Suspended Nanofluid (SiO$$_{2}$$/Water) Droplets: Experimental Results and Modelling

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