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Howard NS, Archer AJ, Sibley DN, Southee DJ, Wijayantha KGU. Surfactant Control of Coffee Ring Formation in Carbon Nanotube Suspensions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:929-941. [PMID: 36607610 PMCID: PMC9878724 DOI: 10.1021/acs.langmuir.2c01691] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 12/06/2022] [Indexed: 06/17/2023]
Abstract
The coffee ring effect regularly occurs during the evaporation of colloidal droplets and is often undesirable. Here we show that adding a specific concentration of a surfactant can mitigate this effect. We have conducted experiments on aqueous suspensions of carbon nanotubes that were prepared with cationic surfactant dodecyltrimethylammonium bromide added at 0.2, 0.5, 1, 2, 5, and 10 times the critical micelle concentration. Colloidal droplets were deposited on candidate substrates for printed electronics with varying wetting characteristics: glass, polyethylene terephthalate, fluoroethylene propylene copolymer, and polydimethylsiloxane. Following drying, four pattern types were observed in the final deposits: dot-like, uniform, coffee ring deposits, and combined patterns (coffee ring with a dot-like central deposit). Evaporation occurred predominantly in constant contact radius mode for most pattern types, except for some cases that led to uniform deposits in which early stage receding of the contact line occurred. Image analysis and profilometry yielded deposit thicknesses, allowing us to identify a coffee ring subfeature in all uniform deposits and to infer the percentage coverage in all cases. Importantly, a critical surfactant concentration was identified for the generation of highly uniform deposits across all substrates. This concentration resulted in visually uniform deposits consisting of a coffee ring subfeature with a densely packed center, generated from two distinct evaporative phases.
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Affiliation(s)
- N. S. Howard
- Department
of Chemistry, Loughborough University, Loughborough LE11 3TU, U.K.
| | - A. J. Archer
- Department
of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, U.K.
- Interdisciplinary
Centre for Mathematical Modelling, Loughborough
University, Loughborough LE11 3TU, U.K.
| | - D. N. Sibley
- Department
of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, U.K.
- Interdisciplinary
Centre for Mathematical Modelling, Loughborough
University, Loughborough LE11 3TU, U.K.
| | - D. J. Southee
- School
of Design and Creative Arts, Loughborough
University, Loughborough LE11 3TU, U.K.
| | - K. G. U. Wijayantha
- Department
of Chemistry, Loughborough University, Loughborough LE11 3TU, U.K.
- Centre
for Renewable and Low Carbon Energy, Cranfield
University, Cranfield, Bedfordshire MK43 0AL, U.K.
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Andac T, Weigmann P, Velu SKP, Pinçe E, Volpe G, Volpe G, Callegari A. Active matter alters the growth dynamics of coffee rings. SOFT MATTER 2019; 15:1488-1496. [PMID: 30570633 DOI: 10.1039/c8sm01350k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
How particles are deposited at the edge of evaporating droplets, i.e. the coffee ring effect, plays a crucial role in phenomena as diverse as thin-film deposition, self-assembly, and biofilm formation. Recently, microorganisms have been shown to passively exploit and alter these deposition dynamics to increase their survival chances under harshening conditions. Here, we show that, as the droplet evaporation rate slows down, bacterial mobility starts playing a major role in determining the growth dynamics of the edge of drying droplets. Such motility-induced dynamics can influence several biophysical phenomena, from the formation of biofilms to the spreading of pathogens in humid environments and on surfaces subject to periodic drying. Analogous dynamics in other active matter systems can be exploited for technological applications in printing, coating, and self-assembly, where the standard coffee-ring effect is often a nuisance.
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Affiliation(s)
- Tugba Andac
- Soft Matter Lab, Department of Physics, Bilkent University, Ankara, Turkey.
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Parsa M, Harmand S, Sefiane K, Bigerelle M, Deltombe R. Effect of Substrate Temperature on Pattern Formation of Bidispersed Particles from Volatile Drops. J Phys Chem B 2017; 121:11002-11017. [DOI: 10.1021/acs.jpcb.7b09700] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maryam Parsa
- LAMIH
Laboratory, UMR CNRS 8201, University of Valenciennes, Valenciennes 59313, France
- University of Lille Nord de France, Rue Jules Guesde, Villeneuve d’Ascq 59658, France
| | - Souad Harmand
- LAMIH
Laboratory, UMR CNRS 8201, University of Valenciennes, Valenciennes 59313, France
- University of Lille Nord de France, Rue Jules Guesde, Villeneuve d’Ascq 59658, France
| | - Khellil Sefiane
- School
of Engineering, University of Edinburgh, Kings Buildings, Edinburgh EH9 3JL, U.K
- International
Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Maxence Bigerelle
- LAMIH
Laboratory, UMR CNRS 8201, University of Valenciennes, Valenciennes 59313, France
- University of Lille Nord de France, Rue Jules Guesde, Villeneuve d’Ascq 59658, France
| | - Raphaël Deltombe
- LAMIH
Laboratory, UMR CNRS 8201, University of Valenciennes, Valenciennes 59313, France
- University of Lille Nord de France, Rue Jules Guesde, Villeneuve d’Ascq 59658, France
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Wang G, Liu Y, Liu Y, Xia N, Zhou W, Gao Q, Liu S. The non-equilibrium self-assembly of amphiphilic block copolymers driven by a pH oscillator. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.06.078] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Wang Y, Ma L, Xu X, Luo J. Expressions for the evaporation of sessile liquid droplets incorporating the evaporative cooling effect. J Colloid Interface Sci 2016; 484:291-297. [DOI: 10.1016/j.jcis.2016.09.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/06/2016] [Accepted: 09/06/2016] [Indexed: 11/29/2022]
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Emile J, Tabuteau H. Effect of the initial particle volume fraction on the structure of a drying colloidal deposit. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.09.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang Y, Ma L, Xu X, Luo J. Combined effects of underlying substrate and evaporative cooling on the evaporation of sessile liquid droplets. SOFT MATTER 2015; 11:5632-5640. [PMID: 26059590 DOI: 10.1039/c5sm00878f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The evaporation of pinned, sessile droplets resting on finite thickness substrates was investigated numerically by extending the combined field approach to include the thermal properties of the substrate. By this approach, the combined effects of the underlying substrate and the evaporative cooling were characterized. The results show that the influence of the substrate on the droplet evaporation depends largely on the strength of the evaporative cooling. When the evaporative cooling is weak, the influence of substrate is also weak. As the strength of evaporative cooling increases, the influence of the substrate becomes more and more pronounced. Further analyses indicated that it is the cooling at the droplet surface and the temperature dependence of the saturation vapor concentration that relate the droplet evaporation to the underlying substrate. This indicates that the evaporative cooling number, Ec, can be used to identify the influence of the substrate on the droplet evaporation. The theoretical predictions by the present model are compared and found to be in good agreement with the experimental measurements. The present work may contribute to the body of knowledge concerning droplet evaporation and may have applications in a wide range of industrial and scientific processes.
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Affiliation(s)
- Yilin Wang
- School of Technology, Beijing Forestry University, Beijing 100083, China.
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Parsa M, Harmand S, Sefiane K, Bigerelle M, Deltombe R. Effect of substrate temperature on pattern formation of nanoparticles from volatile drops. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:3354-3367. [PMID: 25742508 DOI: 10.1021/acs.langmuir.5b00362] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study investigates pattern formation during evaporation of water-based nanofluid sessile droplets placed on a smooth silicon surface at various temperatures. An infrared thermography technique was employed to observe the temperature distribution along the air-liquid interface of evaporating droplets. In addition, an optical interferometry technique is used to quantify and characterize the deposited patterns. Depending on the substrate temperature, three distinctive deposition patterns are observed: a nearly uniform coverage pattern, a "dual-ring" pattern, and multiple rings corresponding to "stick-slip" pattern. At all substrate temperatures, the internal flow within the drop builds a ringlike cluster of the solute on the top region of drying droplets, which is found essential for the formation of the secondary ring deposition onto the substrate for the deposits with the "dual-ring" pattern. The size of the secondary ring is found to be dependent on the substrate temperature. For the deposits with the rather uniform coverage pattern, the ringlike cluster of the solute does not deposit as a distinct secondary ring; instead, it is deformed by the contact line depinning. In the case of the "stick-slip" pattern, the internal flow behavior is complex and found to be vigorous with rapid circulating flow which appears near the edge of the drop.
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Affiliation(s)
- Maryam Parsa
- †TEMPO Laboratory, University of Valenciennes, Valenciennes 59313, France
- ‡The VEDECOM Institute, 77 Rue des Chantiers, Versailles 78000, France
| | - Souad Harmand
- †TEMPO Laboratory, University of Valenciennes, Valenciennes 59313, France
| | - Khellil Sefiane
- §School of Engineering, Kings Buildings, University of Edinburgh, Edinburgh EH9 3JL, United Kingdom
- ∥International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
| | - Maxence Bigerelle
- †TEMPO Laboratory, University of Valenciennes, Valenciennes 59313, France
| | - Raphaël Deltombe
- †TEMPO Laboratory, University of Valenciennes, Valenciennes 59313, France
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