Rayleigh‐Instability‐Induced Transformation for Confined Polystyrene Nanotubes Prepared Using the Solvent‐Vapor‐Induced Wetting Method

Fang, Zhi Xuan; Chu, Chien Wei; Tsai, Chia Chan; Chang, Chun Wei; Cheng, Ming; Chang, Chia Chih; Chen, Jiun‐Tai

doi:10.1002/mame.201900465

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…Figure shows the schematic illustrations of the preparation of sc-PMMA powders (bulk state) and nanorods (confined state). To fabricate the polymeric nanostructures via porous templates, there are several well-established procedures, e.g., thermal annealing, microwave annealing, laser-induced annealing, solvent vapor annealing, and solution wetting methods. ,− The formation of the triple-stranded sc-PMMA, however, is highly sensitive to the solvents such as THF or MeCN (Figure a). , Therefore, we choose the solution wetting method followed by a post-thermal treatment in this work, by which the temperature, solvent, and other experimental parameters can be properly controlled. The general procedure using the solution wetting method is described as follows.…”

Section: Resultsmentioning

confidence: 99%

Crystallization of Poly(methyl methacrylate) Stereocomplexes under Cylindrical Nanoconfinement

Lin

Tsai

et al. 2021

Macromolecules

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The stereocomplexation of poly(methyl methacrylate) (PMMA) is a unique supramolecular assembling system that has been demonstrated to be valuable in many applications. The crystallization behaviors of stereocomplex PMMA (sc-PMMA) under nanoconfinement, however, have yet to be fully understood. In this work, we fabricate sc-PMMA nanorods using anodic aluminum oxide (AAO) templates with various pore sizes to gain a fundamental understanding of sc-PMMA in confined states. A scanning electron microscope (SEM), a differential scanning calorimeter (DSC), and an X-ray diffractometer (XRD) are used to examine their morphologies, crystallization kinetics, and crystal characteristics. We discover that the crystallization kinetics of sc-PMMA inside the nanopores is significantly different from the bulk state. Also, the preferred orientation of sc-PMMA crystallites is mainly governed by the degree of spatial confinement and the polymer molecular weight. This work provides a deeper understanding of sc-PMMA under nanoconfinement and presents opportunities for the applications of supramolecular nanostructures in miniaturized devices.

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Section: Resultsmentioning

confidence: 99%

Crystallization of Poly(methyl methacrylate) Stereocomplexes under Cylindrical Nanoconfinement

Lin

Tsai

et al. 2021

Macromolecules

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Rayleigh‐instability‐induced transformation for confined polystyrene‐grafted gold nanoparticles in anodic aluminum oxide templates

Tseng

Chu

Chiu

et al. 2021

J Chinese Chemical Soc

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In the past two decades, Rayleigh-instability transformation of polymers confined in cylindrical nanopores has been actively studied, which is a feasible way to manipulate the morphologies of polymer nanostructures. The applications of Rayleigh-instability-induced morphologies, however, are highly limited because of the usage of pure polymers. In this work, we investigate the Rayleigh-instability-induced transformation of gold nanoparticle/polystyrene (AuNPs@PS) hybrid materials confined in the nanopores of anodic aluminum oxide (AAO) templates. The AuNPs@PS hybrid materials are then introduced into the nanopores of the AAO templates by the solution wetting method to obtain the AuNPs@PS nanotubes. Upon thermal annealing, the AuNPs@PS nanotubes undergo the Rayleigh-instability-induced transformation. Four morphologies are determined, including the nanotube structures, the undulated structures, the Rayleigh-instability-induced structures, and the nanorod structures. To further investigate the effect of the molecular weights of PS, we construct the morphology diagrams by determining the morphologies of the AuNPs@PS hybrid nanostructures at different annealing temperatures and times. The morphology transformation rates increase with the annealing temperatures, and the hybrid materials with PS of higher molecular weights exhibit slower dynamics. This research provides useful strategies to fabricate AuNPs@PS with different morphologies and offers a deeper understanding of the Rayleigh-instability transformation of nanomaterials under confined environments. K E Y W O R D Sanodic aluminum oxide, gold nanoparticles, hybrid nanostructures, Rayleigh instability, thermal annealing | INTRODUCTIONRayleigh instability has been commonly observed in our daily lives. [1,2] For example, water cylinders coming out Yu-Hsuan Tseng and Chien-Wei Chu contributed equally to this work.

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The toolbox of porous anodic aluminum oxide–based nanocomposites: from preparation to application

Huang

Mutlu

2020

Colloid Polym Sci

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Anodic aluminum oxide (AAO) templates have been intensively investigated during the past decades and have meanwhile been widely applied through both sacrificial and non-sacrificial pathways. In numerous non-sacrificial applications, the AAO membrane is maintained as part of the obtained composite materials; hence, the template structure and topography determine to a great extent the potential applications. Through-hole isotropic AAO features nanochannels that promote transfer of matter, while anisotropic AAO with barrier layer exhibits nanocavities suitable as independent and homogenous containers. By combining the two kinds of AAO membranes with diverse organic and inorganic materials through physical interactions or chemical bonds, AAO composites are designed and applied in versatile fields such as catalysis, drug release platform, separation membrane, optical appliances, sensors, cell culture, energy, and electronic devices. Therefore, within this review, a perspective on exhilarating prospect for complementary advancement on AAO composites both in preparation and application is provided.

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Rayleigh‐Instability‐Induced Transformation for Confined Polystyrene Nanotubes Prepared Using the Solvent‐Vapor‐Induced Wetting Method

Cited by 4 publications

References 34 publications

Crystallization of Poly(methyl methacrylate) Stereocomplexes under Cylindrical Nanoconfinement

Crystallization of Poly(methyl methacrylate) Stereocomplexes under Cylindrical Nanoconfinement

Rayleigh‐instability‐induced transformation for confined polystyrene‐grafted gold nanoparticles in anodic aluminum oxide templates

The toolbox of porous anodic aluminum oxide–based nanocomposites: from preparation to application

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