Dewetting behavior of Langmuir−Blodgett films of polystyrene‐<i>b</i>‐poly(methyl methacrylate) induced by solvent vapor annealing

Tang, Wu; Wen, Gangyao; Huang, Changchun

doi:10.1002/polb.23979

Cited by 16 publications

(19 citation statements)

References 43 publications

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“…When the solution of an amphiphilic diblock copolymer spreads at the air/water interface, it can self-assemble into a microphase-separated surface micelle structure comprising hydrophilic coronas and hydrophobic cores. Much work focused on the systems such as polystyrene- block -poly(ethylene oxide) (PS- b -PEO), − polystyrene- block -poly(methyl methacrylate), − and polystyrene- block -poly(vinyl pyridine) − have been widely reported. Three typical features were usually observed: dots (circular aggregates), spaghetti (rodlike aggregates), and continents (planar aggregates) mainly attributed to different block compositions.…”

Section: Introductionmentioning

confidence: 99%

Anion Specificity Effects on the Interfacial Aggregation Behavior of Poly(lauryl acrylate)-block-poly(N-isopropylacrylamide)

et al. 2019

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Aggregation behavior of an amphiphilic diblock copolymer poly(lauryl acrylate)-block-poly(N-isopropylacrylamide) (PLA-b-PNIPAM) on neutral aqueous subphases with different salt species and salt concentrations, as well as the structures of its Langmuir−Blodgett (LB) films, were systematically studied. The presence of NaCl or Na 2 SO 4 in subphases makes PNIPAM chains shrink on the water surface and reduce their solubility underwater. On the contrary, the presence of NaNO 3 or NaSCN makes PNIPAM chains more stretched on water and increase their solubility underwater, whose stretch degree and solubility both increase with the increase of salt concentration. Solubility of PNIPAM chains in the above subphase solutions is ranked as NaSCN ≫ NaNO 3 > pure H 2 O > NaCl ≈ Na 2 SO 4 , which is almost consistent with the Hofmeister series except for the latter two close cases. All the initial LB films of PLA-b-PNIPAM exhibit tiny isolated circular micelles. Upon compression, the LB films in the case of pure H 2 O exhibit the dense mixed structures of circular micelles and wormlike aggregates. The formation of wormlike aggregates is due to connection of some adjoining cores, which is less possible in other subphase cases because of the conformation difference of PNIPAM chains.

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Section: Introductionmentioning

confidence: 99%

Anion Specificity Effects on the Interfacial Aggregation Behavior of Poly(lauryl acrylate)-block-poly(N-isopropylacrylamide)

et al. 2019

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“…However, in our minds, it is possible to obtain the relatively uniform and stable droplet patterns via dewetting of ultrathin block copolymer films with appropriate molecular weight and composition using precise solvent vapor annealing conditions. Furthermore, it is worth noting that we recently report a periodic droplet evolution in the final dewetting stage in the LangmuirBlodgett (LB) films of SMMA34K and SMMA51K, which is probably due to the degree of contact between PMMA blocks and the substrate in the ordered LB films being larger than that in the disordered spin-coated films [48].…”

Section: Discussionmentioning

confidence: 98%

Effects of copolymer composition, film thickness, and solvent vapor annealing time on dewetting of ultrathin block copolymer films

Huang

Wen

et al. 2016

Journal of Colloid and Interface Science

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“…The proposed mechanism might be generalized for zero-dimensional dot-dispersed monolayers of block-copolymers. Wen and co-workers reported the drastic modification of two-dimensionally patterned Langmuir–Blodgett (LB) films of polystyrene- b -poly(2-vinylpyridine) transferred from the air–water interface through acetone vapour annealing [201]. Complicated morphology shifts such as swelling, coalescing of aggregates, bicontinuous pattern formation, one-dimensional droplet formation, and the periodic evolution of the droplets were observed.…”

Section: Reviewmentioning

confidence: 99%

Materials nanoarchitectonics at two-dimensional liquid interfaces

Ariga

Matsumoto

Mori

2019

Beilstein J. Nanotechnol.

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Much attention has been paid to the synthesis of low-dimensional materials from small units such as functional molecules. Bottom-up approaches to create new low-dimensional materials with various functional units can be realized with the emerging concept of nanoarchitectonics. In this review article, we overview recent research progresses on materials nanoarchitectonics at two-dimensional liquid interfaces, which are dimensionally restricted media with some freedoms of molecular motion. Specific characteristics of molecular interactions and functions at liquid interfaces are briefly explained in the first parts. The following sections overview several topics on materials nanoarchitectonics at liquid interfaces, such as the preparation of two-dimensional metal-organic frameworks and covalent organic frameworks, and the fabrication of low-dimensional and specifically structured nanocarbons and their assemblies at liquid–liquid interfaces. Finally, interfacial nanoarchitectonics of biomaterials including the regulation of orientation and differentiation of living cells are explained. In the recent examples described in this review, various materials such as molecular machines, molecular receptors, block-copolymer, DNA origami, nanocarbon, phages, and stem cells were assembled at liquid interfaces by using various useful techniques. This review overviews techniques such as conventional Langmuir–Blodgett method, vortex Langmuir–Blodgett method, liquid–liquid interfacial precipitation, instructed assembly, and layer-by-layer assembly to give low-dimensional materials including nanowires, nanowhiskers, nanosheets, cubic objects, molecular patterns, supramolecular polymers, metal-organic frameworks and covalent organic frameworks. The nanoarchitecture materials can be used for various applications such as molecular recognition, sensors, photodetectors, supercapacitors, supramolecular differentiation, enzyme reactors, cell differentiation control, and hemodialysis.

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Dewetting behavior of Langmuir−Blodgett films of polystyrene‐b‐poly(methyl methacrylate) induced by solvent vapor annealing

Cited by 16 publications

References 43 publications

Anion Specificity Effects on the Interfacial Aggregation Behavior of Poly(lauryl acrylate)-block-poly(N-isopropylacrylamide)

Anion Specificity Effects on the Interfacial Aggregation Behavior of Poly(lauryl acrylate)-block-poly(N-isopropylacrylamide)

Effects of copolymer composition, film thickness, and solvent vapor annealing time on dewetting of ultrathin block copolymer films

Materials nanoarchitectonics at two-dimensional liquid interfaces

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