Increasing aspect ratio of particles suppresses buckling in shells formed by drying suspensions.
basic_science · Level V
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- Record sourced from PubMed, PMID 32954396.
- Also identified by DOI 10.1039/d0sm01467b.
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Abstract
Solvent evaporation in unpinned droplets of colloidal suspensions leads to the formation of porous shells which buckle under the pressure differential imposed by drying. We investigate the role of aspect ratio of rod-shaped particles in suppressing such buckling instabilities. Longer, thinner rods pack into permeable shells with consequently lower Darcy's pressure and thus avoid buckling.