Journal article
Interaction of bi-dispersed particles with contact line in an evaporating colloidal drop
Soft matter, v 7(21), pp 10135-10143
01 Jan 2011
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The deposition behavior of an inkjet-printed aqueous colloidal mixture of micro-and nanoparticles onto a glass substrate with systematically varied wettability has been investigated using fluorescence microscopy. Real-time bottom-view images show that particles inside an evaporating drop rearrange themselves near the drop contact line according to their sizes, where smaller particles tend to deposit closer to the contact line compared to the larger ones. By increasing substrate wettability, particles in the bi-dispersed mixture can be further separated compared to those on substrates of poor wettability. This is primarily because, during different stages of evaporation, the interplay of surface tension, drag due to evaporative flow, and particle-substrate interactions rearrange particles inside a colloidal drop near the contact line region. Forces acting on particles determine the extent to which particles enhance contact line pinning, which ultimately determines the final deposition morphology of particles from a bi-dispersed colloidal mixture.
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Details
- Title
- Interaction of bi-dispersed particles with contact line in an evaporating colloidal drop
- Creators
- Viral H. Chhasatia - Drexel UniversityYing Sun - Drexel University
- Publication Details
- Soft matter, v 7(21), pp 10135-10143
- Publisher
- Royal Soc Chemistry
- Number of pages
- 9
- Grant note
- CAREER-0968927 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000296026700045
- Scopus ID
- 2-s2.0-80055002793
- Other Identifier
- 991019167435204721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Physics, Multidisciplinary
- Polymer Science