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Film Confinement Induced "Jump-Percolation" Wetting Transition in Amphiphilic Block Copolymer Films



Namrata Salunke, Asritha Nallapaneni, Guangcui Yuan, Christopher Stafford, Hui Niu, Matthew D. Shawkey, R. A. Weiss, Alamgir Karim


A sharp surface wettability transition with varying film thickness dependent morphology was observed in cast films of an amphiphilic triblock copolymer comprised of poly(2-(N-ethylperfluotooctanesulfonamido) ethyl methylacrylate), poly(FOSM), and poly(N,N'-dimethylacrylamide), poly(DMA). Films with thickness (h) in the range, 200 nm c ''6 ° to 40 ° in 3-4 s. Relatively shallow decreasing water contact angle (θw) gradients were observed around this transitional film thickness for films in the overall range of 40 nm
ACS Applied Materials and Interfaces


block copolymer film, hydrophobic to hydrophilic transition


Salunke, N. , Nallapaneni, A. , Yuan, G. , Stafford, C. , Niu, H. , Shawkey, M. , Weiss, R. and Karim, A. (2017), Film Confinement Induced "Jump-Percolation" Wetting Transition in Amphiphilic Block Copolymer Films, ACS Applied Materials and Interfaces, [online],, (Accessed April 24, 2024)
Created September 30, 2017, Updated October 12, 2021