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Issue 3, 2014
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The effect of drop size on contact angle measurements of superhydrophobic surfaces

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Abstract

In this study, the effect of drop volume on contact angle (CA) values and also on the applicability of the Cassie–Baxter equation is experimentally investigated. To do this, dimethyldichlorosilane (DMDCS) coated different sized square pillar surfaces with varying fCBs(geo) values were used. Varying water drop volumes between 0.5 μl and 19 μl were used to measure CA's on square pillar surfaces with different pattern sizes changing from 8 μm to 40 μm. It was found that experimental CA values remained constant for each drop volume, indicating that increase or decrease in drop volume had no significant effect on experimentally measured CA values of square pillar surfaces with varying pattern sizes and fCBs(geo) values. When the relationship between the applicability of the Cassie–Baxter equation and the drop volume was investigated, it was also found that variation in volume of the drop did not cause a significant change in deviations between the theory and the experiments. ΔθCB values remained almost constant for all samples at varying drop volumes.

Graphical abstract: The effect of drop size on contact angle measurements of superhydrophobic surfaces

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Publication details

The article was received on 19 Oct 2013, accepted on 18 Nov 2013 and first published on 18 Nov 2013


Article type: Paper
DOI: 10.1039/C3RA45947K
RSC Adv., 2014,4, 1197-1203

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    The effect of drop size on contact angle measurements of superhydrophobic surfaces

    C. E. Cansoy, RSC Adv., 2014, 4, 1197
    DOI: 10.1039/C3RA45947K

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