0 20 40 60 80 100 50
60 70 80 90 100 110
Fluorination pressure (kPa) Cont act angl e (
o)
water
methylene iodide
0 10 20 30 40 50 60 70 50
60 70 80 90 100 110
Fluorination time (min) Cont act angl e (
o)
water
methylene iodide
0 20 40 60 80
0 5 10 15 20 25 30 35
Sur face f re e ene rg y ( m N /m )
Fluorination pressure (kPa) polar ( γ
p) dispersive ( γ
d) total ( γ
T)
0 10 20 30 40 50 60
0 5 10 15 20 25 30 35
polar ( γ
p) dispersive ( γ
d) total ( γ
T)
Su rf ace f re e e ner gy ( m N /m )
Fluorination time (min)
4000 3500 3000 2500 2000 1500 1000 (d)
(c) (b)
(a) untreated (b) 5kPa, 5min (c) 5kPa, 60min (d) 80kPa, 5min
(a)
-CF
-CH
Wavenumber (cm
-1)
1000 800 600 400 200 0
(c) 60 min
(b) 5 min (a) untreated
FKVV
O1s F1s
C1s
Binding energy (eV)
298 296 294 292 290 288 286 284 282 (d) 60 min
(b) 5 min
(a) untreated 5 5
4 4
3 3
2 2
1 1 1
Binding energy (eV)
676 674 672 670 668 attached F
2