Tears of wine: new insights on an old phenomenon

Venerus, David C.; Simavilla, David Nieto

doi:10.1038/srep16162

Cited by 51 publications

(37 citation statements)

References 31 publications

(66 reference statements)

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“…Many studies have revealed novel, microscopic contact line instabilities resembling fingers driven primarily by thermal or surfactant-based Marangoni forces [10][11][12][13][14]. Although less studied, solutal Marangoni forces are responsible for droplet "bursting" patterns on liquid surfaces [15], can delay mixing of miscible liquids [16], and produce the well-known "tears of wine" phenomenon [17][18][19][20]. In wine, the evaporation of the volatile solute (ethanol) leads to a higher surface tension near the contact line which pulls the liquid film up the sides of the glass.…”

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confidence: 99%

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Tuning Contact Line Dynamics and Deposition Patterns in Volatile Liquid Mixtures

et al. 2020

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The spreading of a pure, volatile liquid on a wettable substrate has been studied in extensive detail. Here we show that the addition of a miscible, non-volatile liquid can strongly alter the contact line dynamics and the final liquid deposition pattern. We observe two distinct regimes of behavior depending on the relative strength of solutal Marangoni forces and surface wetting. Fingerlike instabilities precede the deposition of a sub-micron thick film for large Marangoni forces and small solute contact angles, whereas isolated, pearl-like drops emerge and are deposited in quasicrystalline patterns for small Marangoni forces and large solute contact angles. This behavior can be tuned by directly varying the contact angle of the solute liquid on the solid substrate.

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confidence: 99%

“…We note that this boundary applies to a wide range of volume fractions tested in our experiments, 0.001 < φ < 0.3. Higher concentrations of solute (φ > 0.5) are related to "tears of wine", where the non-volatile component is dominant, and gravitational forces are important [17][18][19][20].…”

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confidence: 99%

Tuning Contact Line Dynamics and Deposition Patterns in Volatile Liquid Mixtures

et al. 2020

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“…To detect the presence of alcohol, people commonly look for tears of wine, a phenomenon by which a ring of clear liquid above wine in a glass forms beads that drop back into the wine, leaving a vertical trace of “tears” ( Figure ). This is an instance of the Marangoni effect caused by the difference in surface tension between alcohol and water and is more pronounced in wines with higher alcohol content . The Marangoni effect is also observed in various fluid flow and surface chemistry processes.…”

Section: The Marangoni Effectmentioning

confidence: 82%

Section: The Marangoni Effectmentioning

confidence: 99%

Interface Colloidal Deposition of Nanoparticle Wire Structures

Tian

Crowe

Shao

et al. 2018

Part & Part Syst Charact

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Development of fabrication methods for nanoparticle structures, such as dielectrophoresis [3] and lithography, is an active area of research. Existing lithography methods can either directly assemble nanoparticles in the shape of arrays [4] or provide a platform for nanoparticle assembly. [5] Ordered arrangements of nanoparticles on templates such as block copolymer scaffolds [6] and crystal step edges [7] have also been explored. Efforts to assemble nanoparticles onto substrates via molecular linkers in patterned [8] and unpatterned [9] geometries have also been reported. Single-step assembly methods like dielectrophoresis are attractive; [10] however, users may have limited control of the resulting structures and must take care to tune the dielectric contrast between particles and solvents in order to achieve optimal results. These and other approaches for fabricating nanoparticle structures are promising for new advanced materials [3,11] and have attracted significant attention for real applications, such as nanocoatings and sensors. [8,10,12] Meanwhile, the demand for green manufacturing techniques has dramatically increased due to environmental pressures. [13] Some of the many green strategies include: utilizing alternative feedstock through biorefinery development; [14] identifying more economical reactions; using green solvents, such as ionic liquids, supercritical carbon dioxide (scCO 2 ), and other environmentally benign organic solvents; [15] and optimizing synthetic methodologies for creating advanced materials out of nanoparticle building blocks. [16] Since green chemistry has been successful on many fronts in pharmaceuticals, [17] scientists and engineers are optimistic about integrating clean manufacturing techniques into nanoscience to develop high-precision, low-waste fabrication methods. [18] In addition, green manufacturing techniques improve public perception of nanoscience by creating a responsible attitude toward the development of new technology.Inspired by natural dewetting phenomena, such as the coffee-ring effect and wine tears, researchers have designed strategies for the controlled assembly of colloidal particles into larger, ordered structures. Dimitrov and Nagayama developed a method of colloidal deposition for polycrystalline monolayer films at the air-liquid-solid interface, [19] and Jiang et al. used a similar approach to fabricate photonic structures. [20] Through this method, gold nanoparticle films were produced, [21] which may serve as an excellent matrix for laser desorption ionization mass spectrometry. [22] Despite hazardous materials involved in nanoparticle synthesis, colloidal deposition is regarded as a greener technique as it reduces or eliminates the use or Inspired by natural dewetting phenomena, such as the coffee-ring effect, researchers are developing strategies for the controlled assembly of colloidal particles into functional nanoparticle conglomerates. Colloidal assembly techniques are regarded as green methods as they reduce or eliminate the use or generatio...

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“…Unfortunately, the predicted values of alcohol content often overestimate the real values in commercial wines [ 18 ]. One can also qualitatively assess alcohol and sugar content by twirling a glass of wine [ 19 ]. In addition to the release of the wine’s aromatic compounds in the air, twirling causes a portion of the wine to adhere to the walls of the glass.…”

Section: Introductionmentioning

confidence: 99%

Assessing White Wine Viscosity Variation Using Polarized Laser Speckle: A Promising Alternative to Wine Sensory Analysis

Nader

Loutfi

Pellen

et al. 2017

Sensors

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In this paper, we report measurements of wine viscosity, correlated to polarized laser speckle results. Experiments were performed on white wine samples produced with a single grape variety. Effects of the wine making cellar, the grape variety, and the vintage on wine Brix degree, alcohol content, viscosity, and speckle parameters are considered. We show that speckle parameters, namely, spatial contrast and speckle decorrelation time, as well as the inertia moment extracted from the temporal history speckle pattern, are mainly affected by the alcohol and sugar content and hence the wine viscosity. Principal component analysis revealed a high correlation between laser speckle results on the one hand and viscosity and Brix degree values on the other. As speckle analysis proved to be an efficient method of measuring the variation of the viscosity of white mono-variety wine, one can therefore consider it as an alternative method to wine sensory analysis.

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Tears of wine: new insights on an old phenomenon

Cited by 51 publications

References 31 publications

Tuning Contact Line Dynamics and Deposition Patterns in Volatile Liquid Mixtures

Tuning Contact Line Dynamics and Deposition Patterns in Volatile Liquid Mixtures

Interface Colloidal Deposition of Nanoparticle Wire Structures

Assessing White Wine Viscosity Variation Using Polarized Laser Speckle: A Promising Alternative to Wine Sensory Analysis

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