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

Published

October 1, 2017

Author(s)

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

Abstract

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 (θ_w) gradients were observed around this transitional film thickness for films in the overall range of 40 nm

Citation

ACS Applied Materials and Interfaces

Volume

9

Issue

40

Pub Type

Journals

Download Paper

https://doi.org/10.1021/acsami.7b07245

Local Download

Keywords

block copolymer film, hydrophobic to hydrophilic transition

Citation

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], https://doi.org/10.1021/acsami.7b07245, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923245 (Accessed September 30, 2025)