Journal
SOFT MATTER
Volume 7, Issue 9, Pages 4152-4155Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1sm05241a
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Funding
- Eric Birse Charitable Trust
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We report on the structure of ring deposits formed following the free evaporation of a sessile droplet containing nanoparticles. The nanostructure of the evaporatively formed deposits was revealed using atomic force microscopy (AFM). The structures were found to form a peak about 5 microns wide and one micron high and to exhibit a gentle slope gradually increasing in height in the direction of the three phase contact line motion. A theory is proposed to explain the formation and shape of these deposits. A comparison between the theory and the experiments shows a very good qualitative and quantitative agreement.
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