2011
DOI: 10.1103/physrevlett.107.148304
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Surface Energies and Self-Assembly of Block Copolymers on Grafted Surfaces

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Cited by 22 publications
(34 citation statements)
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“…Another assumption made about grafted random copolymers is that they act as hard walls during thermal annealing of the overlying BCP. However, recent studies have shown that the underlying grafted random copolymer undergoes significant restructuring and interpenetration into the overlying BCP layer to maximize A–A and B–B contact, obviously a phenomenon that does not occur in homopolymer brushes . Furthermore, the studies show that “randomness” or “blockiness” of the monomer sequence in random copolymer also influences the BCP orientation.…”
Section: Substrate Neutralizationmentioning
confidence: 99%
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“…Another assumption made about grafted random copolymers is that they act as hard walls during thermal annealing of the overlying BCP. However, recent studies have shown that the underlying grafted random copolymer undergoes significant restructuring and interpenetration into the overlying BCP layer to maximize A–A and B–B contact, obviously a phenomenon that does not occur in homopolymer brushes . Furthermore, the studies show that “randomness” or “blockiness” of the monomer sequence in random copolymer also influences the BCP orientation.…”
Section: Substrate Neutralizationmentioning
confidence: 99%
“…Interestingly, at perfectly neutral compositions, blocky random copolymers have lower total interfacial energy than their truly random (alternating) counterpart when the overlying BCP adopts perpendicular orientation. However, the “neutral‐ness,” or ability to produce perpendicular microdomains, of blocky random copolymers fades much more rapidly as the composition becomes increasingly off‐neutral . Notwithstanding such attributes of random copolymer neutral layers, the concept of neutral layers is often simplified for general experimental use.…”
Section: Substrate Neutralizationmentioning
confidence: 99%
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“…This feature is a definite merit in a material design perspective, considering that copolymer melts and blends containing copolymers are affected in their phase behaviors by monomer sequences along copolymer chain contours [10e24]. Among vast choices, recent efforts have been exerted to understand the properties of linear gradient copolymers, in particular, in the molten state [12,14,19], in solutions [21,25], and as interfacial layers [24] and brushes [22,23]. Wang et al studied the phase behavior of the blends of two linear homopolymers and the linear gradient copolymers [13], where the changes in the phase diagrams of the blends upon a fixed chain size ratio between the constituent polymers were considered with varying the composition gradient length.…”
Section: Introductionmentioning
confidence: 99%
“…Although past studies have focused on morphology of homopolymer grafted particles in block copolymer domains, there have been significantly fewer investigations involving copolymer grafted particles in a block copolymer matrix. Recent theoretical studies by Ganesan and coworkers 59,60 on flat random copolymer brushes in contact with block copolymer matrix show that the interfacial interactions is modulated by the grafted random copolymers conformations which changes in response to the overlaying block copolymer film. Our work 17 suggests that AB diblock copolymer grafted nanoparticles will exhibit different arrangements in the A and B domains of a block copolymer matrix due to their different effective interactions in A-matrix and B-matrix.…”
Section: Future Directionsmentioning
confidence: 99%