Publications by authors named "Owen M Johnson"
Article Synopsis
- Measuring contact angles in sessile drop experiments is crucial for understanding surface wettability and free energy, but parallax angle (PA) can introduce significant errors in these measurements.
- The study simulated experiments to show that contact angle errors increase when true contact angles deviate from 90°, leading to misestimation—for angles less than 90°, the angle is overestimated, and for angles greater than 90°, it's underestimated.
- Results indicate that the PA and the shape of the drop can influence the accuracy of contact angle measurements, with guidelines provided to minimize these errors in future experiments.*
