Mesoscale networks and corresponding transitions from self-assembly of block copolymers

Chang, Cheng-Yen; Manesi, Gkreti-Maria; Yang, Chih-Ying; Hung, Yu-Chueh; Yang, Kai-Chieh; Chiu, Po-Ting; Avgeropoulos, Apostolos; Ho, Rong‐Ming

doi:10.1073/pnas.2022275118

Cited by 40 publications

(49 citation statements)

References 62 publications

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“…Also, the lipids with single tail and head chains can self-assemble into a series of bicontinuous cubic structures with liquid crystalline properties in the water environment [ 1 ]. The bicontinuous structures are similar to the recently reported continuous cubic phases (Ia3d, Pn3m and Im3m) in the block polymer system [ 24 ]. Cubic structures with Ia3d, Pn3m and Im3m symmetries were observed to be stable at a relatively higher temperature in the ME–water mixtures as determined by X-ray diffraction; phase diagrams were constructed based on water content and temperature [ 19 ].…”

Section: Introductionsupporting

confidence: 86%

Self-Assembly of Lipid Mixtures in Solutions: Structures, Dynamics Processes and Mechanical Properties

Sun

Pan

2022

Membranes

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The self-assembly of lipid mixtures in aqueous solution was investigated by dissipative particle dynamics simulation. Two types of lipid molecules were modelled, where three mixed structures, i.e., the membrane, perforated membrane and vesicle, were determined in the self-assembly processes. Phase behaviour was investigated by using the phase diagrams based on the tail chain lengths for the two types of lipids. Several parameters, such as chain number and average radius of gyration, were employed to explore the structural formations of the membrane and perforated membrane in the dynamic processes. Interface tension was used to demonstrate the mechanical properties of the membrane and perforated membrane in the equilibrium state and dynamics processes. Results help us to understand the self-assembly mechanism of the biomolecule mixtures, which has a potential application for designing the lipid molecule-based bio-membranes in solutions.

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Section: Introductionsupporting

confidence: 86%

Self-Assembly of Lipid Mixtures in Solutions: Structures, Dynamics Processes and Mechanical Properties

Sun

Pan

2022

Membranes

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“…For toluene (δ toluene = 8.9 cal 1/2 /cm 3/2 ), the difference in the solubility parameters (δ PS = 9.1 cal 1/2 /cm 3/2 , δ PDMS = 7.4 cal 1/2 /cm 3/2 ) indicates selectivity towards PS domains, giving rise to double gyroid. Furthermore, chloroform (δ chloroform = 9.3 cal 1/2 /cm 3/2 ) enables the formation of different network phases such as double diamond and double primitive (DP), as already reported in the literature [36]. Note that PDMS swollen ratio is 10% larger in chloroform than in toluene, as reported by Whitesides et al [37].…”

Section: Preparation Of Well-ordered Nanoporous Templatesupporting

confidence: 64%

Block Copolymer Modified Nanonetwork Epoxy Resin for Superior Energy Dissipation

et al. 2022

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Herein, this work aims to fabricate well-ordered nanonetwork epoxy resin modified with poly(butyl acrylate)-b-poly(methyl methacrylate) (PBA-b-PMMA) block copolymer (BCP) for enhanced energy dissipation using a self-assembled diblock copolymer of polystyrene-b-poly(dimethylsiloxane) (PS-b-PDMS) with gyroid and diamond structures as templates. A systematic study of mechanical properties using nanoindentation of epoxy resin with gyroid- and diamond-structures after modification revealed significant enhancement in energy dissipation, with the values of 0.36 ± 0.02 nJ (gyroid) and 0.43 ± 0.03 nJ (diamond), respectively, when compared to intrinsic epoxy resin (approximately 0.02 ± 0.002 nJ) with brittle characteristics. This enhanced property is attributed to the synergic effect of the deliberate structure with well-ordered nanonetwork texture and the toughening of BCP-based modifiers at the molecular level. In addition to the deliberate structural effect from the nanonetwork texture, the BCP modifier composed of epoxy-philic hard segment and epoxy-phobic soft segment led to dispersed soft-segment domains in the nanonetwork-structured epoxy matrix with superior interfacial strength for the enhancement of applied energy dissipation.

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“…78,130,131 Figure 19 shows an example of a 3D SVSEM reconstruction created by registration of a stack of 214 image slices of a polystyrene−polydimethylsiloxane (PS−PDMS) that forms the DD structure. The DD sample 132 was cast from a PS−PDMS (51 kg/mol for PS block and 35 kg/mol for PDMS block) 5 wt % chloroform solution. The acquisition and SVSEM analysis of DD follow the procedure reported in ref 78.…”

Section: Measurements Of Bcp Morphology: Frommentioning

confidence: 99%

Block Copolymers beneath the Surface: Measuring and Modeling Complex Morphology at the Subdomain Scale

et al. 2021

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Block copolymer (BCP) melts are a paradigm for pluripotent molecular assembly, yielding a complex and expanding array of variable domain shapes and symmetries from a fairly simple and highly expandable class of molecular designs. This Perspective addresses recent advances in the ability to model and measure features of domain morphology that go beyond the now canonical metrics of D spacing, space group, and domain topology. Such subdomain features have long been the focus of theories seeking to explain and understand mechanisms of equilibrium structure formation in block copolymer melts, from inhomogeneous curvatures of an intermaterial dividing surface to variable domain thickness. Quantitative metrics of variable subdomain geometry, or packing frustration, are central to theoretical models of complex BCP phase formation, from bicontinuous networks to complex (e.g., Frank–Kasper) crystals, and new experimental methods bring the possibility of their quantitative tests into reach. Here we not only review generic approaches to quantify local domain morphologies that both connect directly to thermodynamic models of BCP assembly but also generalize to domains of arbitrary shape and topology. We then overview experimental methods for characterizing BCP morphology, focusing on recent advances that make accessible detailed and quantitative metrics of fine features of subdomain geometry. Beyond even the critical comparison between detailed predictive models and experimental measurements of complex BCP assembly, validation of these advances lays the foundation to “mold” morphology in BCP assemblies at ever finer subdomain scale, through controlled architectures and processing pathways.

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Mesoscale networks and corresponding transitions from self-assembly of block copolymers

Cited by 40 publications

References 62 publications

Self-Assembly of Lipid Mixtures in Solutions: Structures, Dynamics Processes and Mechanical Properties

Self-Assembly of Lipid Mixtures in Solutions: Structures, Dynamics Processes and Mechanical Properties

Block Copolymer Modified Nanonetwork Epoxy Resin for Superior Energy Dissipation

Block Copolymers beneath the Surface: Measuring and Modeling Complex Morphology at the Subdomain Scale

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