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- W2316873089 abstract "The stability of molecularly thin polymer films deposited on various material substrates is of critical importance to many contemporary nanotechnologies involving functional coatings and nano/micropatterned surfaces, in which case the causes responsible for film destabilization must be fully understood. Previous experimental studies report that factors such as film thickness and polymer molecular weight play significant roles in governing the rate, as well as mechanism, of destabilization. Complementary theoretical predictions reveal that surface heterogeneities can likewise induce (and regulate the process of) destabilization. In this study, we investigate the destabilization rate and mechanism of homopolystyrene (PS) films differing in thickness on top of poly(styrene-b-methyl methacrylate) (SM) diblock copolymer monolayers varying in chemical composition anchored to flat silica-like substrates to examine the effect of surface constitution on PS stability. Copolymers with a long M block consistently promote PS dewetting by nucleation and growth, wherein the linear dewetting rate decreases monotonically with increasing PS molecular weight, film thickness, and S fraction in the SM copolymer. In analogous studies involving a copolymer with a relatively short M block, however, PS dewetting proceeds instead by spinodal dewetting that evolves gradually into nucleation and growth as the film thickness is increased." @default.
- W2316873089 created "2016-06-24" @default.
- W2316873089 creator A5022835935 @default.
- W2316873089 creator A5031464471 @default.
- W2316873089 creator A5091772994 @default.
- W2316873089 date "2014-09-26" @default.
- W2316873089 modified "2023-09-27" @default.
- W2316873089 title "Evolution of Homopolymer Thin-Film Instability on Surface-Anchored Diblock Copolymers Varying in Composition" @default.
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- W2316873089 doi "https://doi.org/10.1021/la503046n" @default.
- W2316873089 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25259655" @default.
- W2316873089 hasPublicationYear "2014" @default.
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