Phase decomposition in polymer blend films cast on substrates patterned with self-assembled monolayers

Cyganik, Piotr; Bernasik, Andrzej; Budkowski, Andrzej; Bergues, B; Kowalski, Kazimierz; Rysz, Jakub; Lekki, Janusz; Lekka, Małgorzata; Postawa, Zbigniew

doi:10.1016/s0042-207x(01)00206-8

Cited by 52 publications

(122 citation statements)

References 19 publications

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“…The combination of carefully adjusted total polymer concentration and spin speed resulted in films with average thickness of 400 -500 (s.-s.) and 50 -80 nm (p.r. [19,40,41].…”

Section: B Films Cast On Homogeneous and Patterned Substratesmentioning

confidence: 99%

“…2). This procedure supplemented by additional immersion in ethanol solution of HS(CH 2 ) 15 COOH produced the second pattern [16][17][18][19]. …”

Section: B Films Cast On Homogeneous and Patterned Substratesmentioning

confidence: 99%

“…11) depends on a wide variety of parameters [7,[14][15][16][17][18][19][20][21][22]. The parameters important for self-stratification, such as interfacial tension γ and surface tension difference ∆γ between coexisting phases, are relevant also here.…”

Section: Pattern Replication (Pr)mentioning

confidence: 99%

“…Self-stratification of thin films with initial compositional homogeneity, leading to a multilayer ordering, is the first [4,[10][11][12][13] of two main problems considered in the present paper. Phase separation in polymer mixtures is also altered by the presence of a pre-structured substrate with lateral pattern of surface energy [7,[14][15][16][17][18][19][20][21] (Fig. 1b).…”

Section: Introductionmentioning

confidence: 99%

“…Pattern replication, i.e. the alignment of phase domains with respect to the patterned substrate (accompanied by free surface undulations), is the second main issue [19] discussed here. Selfassembly of polymer blends, cast as thin films on both homogeneous as well as patterned substrates, is a consequence of surface-directed phase separation [1,3,4,[9][10][11][12][13][23][24][25][26][27][28][29][30][31][32], discovered [23,27] only 10 years ago and described shortly below.…”

Section: Introductionmentioning

confidence: 99%

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Surface-directed phase separation in nanometer polymer films: self-stratification and pattern replication

et al. 2002

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Phase separation occurs in thin films of polymer blends when molecular mobility is promoted by a temperature above the glass transition but inside the twophase region (temperature quench), or a common solvent added to the polymers (solvent quench). This phenomenon can be altered by a homogeneous surface or pre-patterned substrate, resulting, e.g., in self-stratification or pattern replication, respectively. Such self-organisation processes ordering polymer phases were observed for model polymer blends (deuterated/hydrogenated polystyrene, dPS/hPS, and deuterated/partially brominated PS, dPS/PBrS, both with hPSpolyisoprene diblocks added; dPS/poly(vinylpyridine) and PBrS/PVP) with highresolution ion beam techniques (Nuclear Reaction Analysis, profiling and mapping mode of dynamic Secondary Ion Mass Spectrometry) and Atomic Force Microscopy. The self-stratification process is strongly affected by both the range as well as the strength of the surface/polymer interactions. This is illustrated for the temperature-quenched blends with surface-active copolymer additives tuning the interactions exerted by both external surfaces. The pattern transfer from the substrate to the films is demonstrated for the solvent-quenched blends. Patterndirected composition variations (SIMS maps) coincide with free surface undulations (AFM images). The most effective pattern replication is achieved for the length scale of phase domain morphology comparable with the pattern periodicity and for carefully adjusted polymer/substrate interactions.

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“…The combination of carefully adjusted total polymer concentration and spin speed resulted in films with average thickness of 400 -500 (s.-s.) and 50 -80 nm (p.r. [19,40,41].…”

Section: B Films Cast On Homogeneous and Patterned Substratesmentioning

confidence: 99%

“…2). This procedure supplemented by additional immersion in ethanol solution of HS(CH 2 ) 15 COOH produced the second pattern [16][17][18][19]. …”

Section: B Films Cast On Homogeneous and Patterned Substratesmentioning

confidence: 99%