Polymers on Nanoperiodic, Heterogeneous Surfaces

Rockford, L.; Liu, Y.; Mansky, P.; Russell, Thomas P.; Yoon, Mirang; Mochrie, S. G. J.

doi:10.1103/physrevlett.82.2602

Cited by 444 publications

(442 citation statements)

References 24 publications

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“…when substrate/polymer interactions dominate over the interfacial tension term (a free surface is usually assumed to be neutral). In the other limit, ∆γ w << d γ, there is no pattern transfer into the blend film and only local alignment close to the substrate with very strong surface fields is eventually observed [7]. Fig.…”

Section: Pattern Replication (Pr)mentioning

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%

“…For thin films this micro-phase separation process is altered by the presence of a homogeneous surface which controls the orientation of the domain morphology [1][2][3]6]. The domains can be also arranged into patterns reflecting lateral chemical [7] or topographic [8] modifications of the substrate.…”

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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Section: Pattern Replication (Pr)mentioning

confidence: 99%

Section: Pattern Replication (Pr)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2002

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] This method has been used to produce large-area defect-free lamellar, cylindrical, or spherical microdomain patterns through chemical [1][2][3][4][5][6] or topographical [7][8][9][10][11][12][13][14][15] templating. However, the formation of complex patterns with multiple morphologies in one BCP film (e.g.…”

mentioning

confidence: 99%

Rectangular Symmetry Morphologies in a Topographically Templated Block Copolymer

et al. 2012

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Templated self-assembly of block copolymer (BCP) thin films can enhance the resolution and throughput of nanoscale lithography processes. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] This method has been used to produce large-area defect-free lamellar, cylindrical, or spherical microdomain patterns through chemical [1][2][3][4][5][6] or topographical [7][8][9][10][11][12][13][14][15] templating. However, the formation of complex patterns with multiple morphologies in one BCP film (e.g. coexisting cylinders and spheres) requires additional process steps such as sequential cross-linking and solvent anneals. [19,20] The period of the patterns is determined by the BCP chain length, and sub-10-nm-period (sub-5-nm halfpitch) patterns have been reported from low molecular weight BCPs. [8] While a hexagonal lattice of microdomains is readily obtained from a diblock copolymer, obtaining a square symmetry pattern requires 1:1 templating of a diblock copolymer [21] , or use of a triblock terpolymer [22] or a blend of diblock copolymers [23] . We show that by using an array of majority-block-functionalized posts, it is possible to locally control the morphology of a

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Block Copolymers

Hamley

2002

Encyclopedia of Polymer Science and Technology

107

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The synthesis, morphology, and dynamics of block copolymers in various states is reviewed. Living polymerization techniques used to prepare well‐defined diblock, triblock, and starblock copolymers are first summarized. Then the phase behavior of block copolymers in the melt is discussed, based on experimental and theoretical work. The effect of confinement on block copolymers in thin films is then considered. The behavior of block copolymers in solution and applications resulting from micelle formation are also reviewed. The effect of crystallization on block copolymer morphology is also outlined. Finally, the competing effects of micro‐ and macrophase separation in blends of polymers containing block copolymers is described, along with compatibilization of immiscible polymers by block copolymers.

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Polymers on Nanoperiodic, Heterogeneous Surfaces

Abstract: ACKNOWLEDGEMENTS

Cited by 444 publications

References 24 publications

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

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

Rectangular Symmetry Morphologies in a Topographically Templated Block Copolymer

Block Copolymers

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