Etching time

(min)

Track opening diameter

(μm)

80

7.60 ± 0.45

85

8.42 ± 0.60

90

8.73 ± 0.57

95

10.36 ± 0.67

100

10.33 ± 0.77

105

11.76 ± 0.88

110

12.43 ± 0.81

115

13.57 ± 0.88

120

13.36 ± 0.84

125

13.58 ± 0.88

130

14.21 ± 1.08

135

14.76 ± 0.95