Surface-directed spinodal decomposition

Jones, Richard; Norton, Laura J.; Krämer, Edward J.; Bates, Frank S.; Wiltzius, Pierre

doi:10.1103/physrevlett.66.1326

Cited by 446 publications

(350 citation statements)

References 20 publications

Supporting

Mentioning

333

Contrasting

Unclassified

Order By: Relevance

“…46,47 However, given the likely variation in diffusion coefficients between different additives it would seem improbable that each would so often arrive at the same final state after the same period of annealing. Partial dewetting of the film above a wetting layer of xOHdPEy, could also yield such data as the ion beam would detect the exposed interfacial wetting layer as being at the sample surface.…”

Section: Surface and Interfacial Activity Of Xohdpey In Blended Filmsmentioning

confidence: 99%

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

et al. 2014

View full text Add to dashboard Cite

(2014) 'Multihydroxyl end functional polyethylenes : synthesis, bulk and interfacial properties of polymer surfactants. ', Macromolecules., 47 (6). pp. 2062', Macromolecules., 47 (6). pp. -2071 Further information on publisher's website:http://dx.doi.org/10.1021/ma402158bPublisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Macromolecules, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/ma402158bAdditional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. for polar interfaces, are thermally stable up to ~ 250 °C, and to have similar crystallinity and dynamics to their unfunctionalised homopolymers analogues. The polymers segregated strongly to silicon oxide interfaces, with adsorbed layers forming spontaneously at annealed polymer interfaces, having surface excess concentrations approaching 2 R g , and a maximum areal density of approximately 0.6 adsorbed chains per nm 2 . This interfacial activity is achieved almost without detriment to the bulk physical properties of the polymer as evidenced by thermal analysis, quasi-elastic neutron scattering and smallangle neutron scattering (SANS). SANS experiments show little evidence for aggregation of the dihydroxyl functionalized polymers in blends with PE homopolymers, which is thought to explain why these additives have particularly strong interfacial adsorption, even at relatively high concentrations. A modest level of segregation of the additives to exposed blend surfaces was also seen, particularly when the additive molecular weight was significantly lower than that of the matrix. We attribute this to a combination of the relatively low molecular weight of the additives and the marginally lower surface energy associated with deuterated polymers.3

show abstract

Section: Surface and Interfacial Activity Of Xohdpey In Blended Filmsmentioning

confidence: 99%

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

et al. 2014

View full text Add to dashboard Cite

show abstract

“…7,9,10 Therefore, a polymer mixture of hA and dA, where hA is unlabeled polymer A and dA is deuterium-substituted polymer A, can exhibit classical phase changes such as spinodal decomposition. 11 The effects of deuteration can also influence the surface and interfacial interactions of polymers. Deuterium-substituted polystyrene (dPS) is known to have a lower surface tension than simple hydrogen-containing PS (hPS), 12 and it has an enthalpic preference for a silicon oxide (SiOx) surface.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effects of Isotopic Labeling at a PS/PMMA Interface Using SIMS and Mean-Field Theory

2006

View full text Add to dashboard Cite

Isotopic labeling (deuteration) is known to affect the phase behavior of polystyrene (PS) and poly-(methyl methacrylate) (PMMA) blends, but little is known regarding the changes in the interfacial properties at the PS/PMMA interface due to deuteration of PS and/or PMMA. To investigate these potential changes, secondary ion mass spectrometry (SIMS) was used to measure real-space depth profiles of dPS in hPS:dPS/hPMMA bilayers, with the hPS:dPS blend being well within the single-phase region of the phase diagram. Profound changes in the thermodynamic behavior of this system at the polymer/polymer interface are observed in the form of significant segregation of dPS to the hPS:dPS/hPMMA interface. The observation of a depletion hole during the formation of an equilibrium excess of dPS implies that the energetic gain at the interface per dPS chain has to be >kT. These results cannot be described, even qualitatively, using previously reported changes in for PS/PMMA due to isotopic labeling. The previously reported values of for dPS/hPMMA and hPS/hPMMA actually predict a depletion of dPS at the hPS:dPS/hPMMA interface rather than the observed segregation. The observed interfacial excess is quantified by generating theoretical profiles, using self-consistent mean-field theory (SCMF), and fitting an effective interaction energy parameter ∆ p as a function of temperature. This parameter represents the asymmetry in dPS/hPMMA and hPS/PMMA interactions. The temperature dependency of ∆ p was found to be a factor of 3-4 greater than any of those reported for of PS/PMMA. It was also found that SCMF theory accurately describes the concentration dependency of dPS segregation at a constant dPS molecular weight using a concentration-independent ∆ p ; however, ∆ p was found to be dependent on dPS molecular weight.

show abstract

“…In the mesoscale regime where film thickness is comparable to the characteristic size of the building-block, i.e., the diameter of the colloid particle, or the size of the discrete phase of the block copolymer, or the radius of gyration of the protein molecule, etc., the interfacial properties have a profound effect on the structure of the complex fluid. Wetability is shown to influence the equilibrium phase segregation 7 and impart topography defined by the size and shape of the discrete phase. 8 In block copolymers, altering the fluid/substrate interfacial tension, the discrete phase can by oriented parallel or perpendicular to the plane of the film.…”

mentioning

confidence: 99%

Spontaneous planarization of nanoscale phase separated thin film

Saraf

Niu

Stumb

2002

Applied Physics Letters

View full text Add to dashboard Cite

Structure of complex fluid at mesoscales is influenced by interfacial effects. We describe the dynamic response in such films to sudden change in interfacial tension. In a self-assembled block copolymer film, the monolayer of 15 nm diam cylindrical discrete phases close to the surface commence to sink at an average rate of 0.16 nm/day in response to the interfacial tension change. Surprisingly, this spontaneous planarization occurs, even though the cylinders are covalently stitched to the matrix. A simple model explains the observed behavior. The observation may lead to approaches to tailor the structure of mesoscale thin films of complex fluids for long-range order that are desirable for nanoscale device fabrication.

show abstract

Surface-directed spinodal decomposition

Cited by 446 publications

References 20 publications

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

Multihydroxyl End Functional Polyethylenes: Synthesis, Bulk and Interfacial Properties of Polymer Surfactants

Investigation of the Effects of Isotopic Labeling at a PS/PMMA Interface Using SIMS and Mean-Field Theory

Spontaneous planarization of nanoscale phase separated thin film

Contact Info

Product

Resources

About