Marangoni Effects on Evaporative Lithographic Patterning of Colloidal Films
| Autor: | Daniel J. Harris, Jennifer A. Lewis |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Chromatography
Marangoni effect Chemistry Evaporation Surfaces and Interfaces Condensed Matter Physics Surface tension Colloid Models Chemical Chemical engineering Volume fraction Electrochemistry Particle Deposition (phase transition) General Materials Science Colloids Volatilization Spectroscopy Particle deposition |
| Zdroj: | Langmuir. 24:3681-3685 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la8000637 |
| Popis: | We investigate the effects of Marangoni stresses on the evaporative lithographic patterning of colloidal films (Harris, D. J.; Hu, H.; Conrad, J. C.; Lewis, J. A. Phys. Rev. Lett. 2007, 98 (14), 148301). Films are dried beneath a mask that induces periodically varying regions of free and hindered evaporation. Direct imaging reveals that silica microspheres suspended within an organic solvent exhibit recirculating flows induced by temperature and surface tension gradients that arise during drying. The films display remarkable pattern formation with a majority of the particles deposited in the masked regions. Above a critical colloid volume fraction, recirculating flows are suppressed, leading to particle deposition in unmasked regions of high evaporative flux. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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