Differences between Colloidal and Crystalline Evaporative Deposits.

@article{McBride2020DifferencesBC,
  title={Differences between Colloidal and Crystalline Evaporative Deposits.},
  author={Samantha A. McBride and Rachael Skye and Kripa K. Varanasi},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  year={2020}
}
Evaporative deposits from drops are widely studied due to their numerous applications in low effort self-assembly; including for ink-jet printing, microscale separations, and sensing/diagnostics. This phenomenon has been broadly explored for drops containing suspended colloidal particles, but has been less quantified for drops with dissolved solutes. When a drop of solute/solvent mixture is evaporated on a substrate, nonvolatile solutes become supersaturated as solvent evaporates, which then… 
7 Citations
Crystal critters: Self-ejection of crystals from heated, superhydrophobic surfaces
TLDR
This work presents a curious phenomenon in which crystals self-eject from heated, nanotextured superhydrophobic materials during evaporation of saline water drops, and demonstrates that self-propulsion can be generated via temperature gradients, which promote asymmetric growth.
Universal spatio-topological control of crystallization in sessile droplets using non-intrusive vapor mediation
The present work showcases a mechanism of asymmetric solvent depletion using vapor-mediated interaction that can non-intrusively regulate the site of crystal precipitation. In general, the flow
Tunable Hydrophobicity via Dimensionally Confined Polymerization of Organometallic Adducts
TLDR
The process is illustrated by creating tunable features on pre‐organized metal particle beds with concomitant tunable wettability as illustrated through the so‐called petal and lotus effects.
Effect of interface-active proteins on the salt crystal size in waterborne hybrid materials
Aqueous processes yielding hybrid or composite materials are widespread in natural environments and their control is fundamental for a multiplicity of living organisms. Their design and in vitro
Influence of Divalent Metal Ions on the Precipitation of the Plasma Protein Fibrinogen.
TLDR
It is assumed that the decisive factor controlling the morphology of fibrinogen precipitates is direct ion-protein contact, which requires disruption of the ion-surrounding hydration shells, whereas divalent ions are limited to indirect fibr inogen adsorption.
Evaporation-Based Low-Cost Method for the Detection of Adulterant in Milk
TLDR
The method can be used to detect a urea concentration as low as 0.4% in milk and a regime map is presented that shows the concentration of urea that can be detected at different extents of dilution of milk.

References

SHOWING 1-10 OF 38 REFERENCES
Self-assembly of colloidal particles from evaporating droplets: role of DLVO interactions and proposition of a phase diagram.
TLDR
The results show that the pH of the solution influences the dried deposit pattern, which can be ring-like or more uniform, and a phase diagram is proposed that explains three types of deposits commonly observed experimentally, such as a peripheral ring, a small central bump, or a uniform layer.
Salt stains from evaporating droplets
TLDR
The results show that the patterns of the resulting salt crystal stains are mainly governed by wetting properties of the emerging crystal as well as the pathway of nucleation and growth, and are independent of the evaporation rate and thermal conductivity of the substrates.
Influence of surfactants on an evaporating drop: Fluorescence images and particle deposition patterns
The insoluble surfactant pentadecanoic acid is spread at the interface of aqueous droplets, which are then deposited on a well-defined substrate and allowed to evaporate. The surface state of the
Polymer patterns in evaporating droplets on dissolving substrates.
TLDR
Self-organized polymer patterns resulting from the evaporation of an organic solvent drop on a soluble layer of polymer are investigated, and the most complex novel pattern consists of a regularly undulating ring made up of a bundle of parallel spaghetti-like threads or striations and radially oriented fingerlike ridges.
Wettability Effect on Evaporation Dynamics and Crystalline Patterns of Sessile Saline Droplets.
TLDR
The evaporative dynamics and crystalline patterns from sessile saline droplets on various substrates are experimentally investigated and it is found that the onset of precipitation is almost overlapped with the end of contact angle enlargement when the contact angle reaches its apex.
Evaporative Crystallization in Drops on Superhydrophobic and Liquid-Impregnated Surfaces.
TLDR
The area, area localization, timescale of evaporation, and deposit morphology are all normalized by the presence of the lubricating layer, thus introducing an efficient method of eliminating crystal "coffee rings" as well as reducing the potential for fouling and corrosion.
Effects of Substrate Heating and Wettability on Evaporation Dynamics and Deposition Patterns for a Sessile Water Droplet Containing Colloidal Particles.
TLDR
A first-order model corroborates the liquid-gas interface temperature measurements and variation in the measured ring profile with the substrate temperature, and proposes a regime map for predicting three types of deposits-namely, ring, thin ring with inner deposit, and inner deposit-for varying substrate temperature.
Capillary flow as the cause of ring stains from dried liquid drops
When a spilled drop of coffee dries on a solid surface, it leaves a dense, ring-like deposit along the perimeter (Fig. 1a). The coffee—initially dispersed over the entire drop—becomes concentrated
Controlled, rapid deposition of structured coatings from micro- and nanoparticle suspensions.
TLDR
The objective of the study was to develop the operational basis for rapid and controlled deposition of crystal coatings from particles of a wide size range by dragging with constant velocity a small volume of liquid confined in a meniscus between two plates.
Suppression of the coffee-ring effect by shape-dependent capillary interactions
TLDR
It is shown experimentally that the shape of the suspended particles is important and can be used to eliminate the coffee-ring effect: ellipsoidal particles are deposited uniformly during evaporation.
...
...