Impact of picoliter droplets on superhydrophobic surfaces with ultralow spreading ratios.
The impact of picoliter-sized water droplets on superhydrophobic CF(4) plasma fluorinated polybutadiene surfaces is investigated with high-speed imaging. Variation of the surface topography by plasmachemical modification enables the dynamics of wetting to be precisely controlled. Final spreading ratios as low as 0.63 can be achieved. A comparison of the maximum spreading ratio and droplet oscillation frequencies to models described in the literature shows that both are found to be much lower than theoretically predicted.
Department of Chemistry, Science Laboratories, Durham University, Durham DH1 3LE, United Kingdom.
P S
PS
Brown
A
A
Berson
E L
EL
Talbot
T J
TJ
Wood
W C E
WC
Schofield
C D
CD
Bain
J P S
JP
Badyal