Research / 2020 / Article / Fig 1

Erratum

Erratum to “The Possibility of Changing the Wettability of Material Surface by Adjusting Gravity”

Figure 1

Apparent contact angles versus the gravity. (a) AFM images of the sample solid surfaces and their section analyses. The analyses show that the surfaces are very smooth, with roughness less than 1 nm. (b) The contact angle on solid surfaces at different gravities. The contact angles show the same tendency to decrease with increasing gravity. The contact angle hysteresis was smaller than 3°, except for the cases of ethylene glycol and glycerol on PDMS9K. (c) Comparison of (the difference in contact angles at 1 G and 8 G) and (the average contact angle hysteresis). Independent test was applied, , , , , , , and , for water on DMDCS, water on PDMS9K, ethylene glycol on PDMS2K, glycerol on DMDCS, glycerol on PDMS2K, and glycerol on PDMS9K, respectively. Five out of the nine solid-liquid contact systems showed significant larger than , and three showed comparable results. The experimental results confirmed that the decrease in contact angle upon increasing gravity is caused by the gravity, not only by the contact angle hysteresis.