Patterning of colloids into spirals via confined drying
Drying of complex fluids is a fascinating subject of interest to several growing fields, for example, forensic science, lithography, printing and coating technologies. In this article, we report that the drying of charge stabilized colloidal dispersions between two parallel plates is a route to intr...
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| Veröffentlicht in: | Soft matter Jg. 16; H. 15; S. 3753 |
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| Format: | Journal Article |
| Sprache: | Englisch |
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England
15.04.2020
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| ISSN: | 1744-6848, 1744-6848 |
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| Abstract | Drying of complex fluids is a fascinating subject of interest to several growing fields, for example, forensic science, lithography, printing and coating technologies. In this article, we report that the drying of charge stabilized colloidal dispersions between two parallel plates is a route to intriguing self-assembly patterns. We show that when the dispersions are dried in parallel plate confinement, particles deposit as spiral patterns after the complete evaporation of the solvent irrespective of the confinement spacing. The formation of such patterns is understood by analyzing the underlying three phase contact line dynamics during the drying process. Compared to the usual discrete stick-slip motion of the contact line, typically observed in several drying configurations, in the parallel plate drying configuration, the contact line is found to exhibit continuous stick-slip motion. The de-pinning of the contact line is found to occur only locally and is observed to propagate in both clockwise and anticlockwise directions, leading to the patterning of colloids as spirals. Furthermore, we show that while the number of turns in the spiral deposit is influenced by the dispersion volume and particle concentration, the spiral patterns form irrespective of the shape of the particles in the dispersion. |
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| AbstractList | Drying of complex fluids is a fascinating subject of interest to several growing fields, for example, forensic science, lithography, printing and coating technologies. In this article, we report that the drying of charge stabilized colloidal dispersions between two parallel plates is a route to intriguing self-assembly patterns. We show that when the dispersions are dried in parallel plate confinement, particles deposit as spiral patterns after the complete evaporation of the solvent irrespective of the confinement spacing. The formation of such patterns is understood by analyzing the underlying three phase contact line dynamics during the drying process. Compared to the usual discrete stick-slip motion of the contact line, typically observed in several drying configurations, in the parallel plate drying configuration, the contact line is found to exhibit continuous stick-slip motion. The de-pinning of the contact line is found to occur only locally and is observed to propagate in both clockwise and anticlockwise directions, leading to the patterning of colloids as spirals. Furthermore, we show that while the number of turns in the spiral deposit is influenced by the dispersion volume and particle concentration, the spiral patterns form irrespective of the shape of the particles in the dispersion. Drying of complex fluids is a fascinating subject of interest to several growing fields, for example, forensic science, lithography, printing and coating technologies. In this article, we report that the drying of charge stabilized colloidal dispersions between two parallel plates is a route to intriguing self-assembly patterns. We show that when the dispersions are dried in parallel plate confinement, particles deposit as spiral patterns after the complete evaporation of the solvent irrespective of the confinement spacing. The formation of such patterns is understood by analyzing the underlying three phase contact line dynamics during the drying process. Compared to the usual discrete stick-slip motion of the contact line, typically observed in several drying configurations, in the parallel plate drying configuration, the contact line is found to exhibit continuous stick-slip motion. The de-pinning of the contact line is found to occur only locally and is observed to propagate in both clockwise and anticlockwise directions, leading to the patterning of colloids as spirals. Furthermore, we show that while the number of turns in the spiral deposit is influenced by the dispersion volume and particle concentration, the spiral patterns form irrespective of the shape of the particles in the dispersion.Drying of complex fluids is a fascinating subject of interest to several growing fields, for example, forensic science, lithography, printing and coating technologies. In this article, we report that the drying of charge stabilized colloidal dispersions between two parallel plates is a route to intriguing self-assembly patterns. We show that when the dispersions are dried in parallel plate confinement, particles deposit as spiral patterns after the complete evaporation of the solvent irrespective of the confinement spacing. The formation of such patterns is understood by analyzing the underlying three phase contact line dynamics during the drying process. Compared to the usual discrete stick-slip motion of the contact line, typically observed in several drying configurations, in the parallel plate drying configuration, the contact line is found to exhibit continuous stick-slip motion. The de-pinning of the contact line is found to occur only locally and is observed to propagate in both clockwise and anticlockwise directions, leading to the patterning of colloids as spirals. Furthermore, we show that while the number of turns in the spiral deposit is influenced by the dispersion volume and particle concentration, the spiral patterns form irrespective of the shape of the particles in the dispersion. |
| Author | Basavaraj, Madivala G Mondal, Ranajit |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/32239019$$D View this record in MEDLINE/PubMed |
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