Nanoengineered Films via Surface‐Confined Continuous Assembly of Polymers

Goh, Tor Kit; Guntari, Stefanie N.; Ochs, Christopher J.; Blencowe, Anton; Mertz, Damien; Connal, Luke A.; Such, Georgina K.; Qiao, Greg G.; Caruso, Frank

doi:10.1002/smll.201101368

Cited by 43 publications

(72 citation statements)

References 34 publications

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“…Qiao, Caruso, and co-workers demonstrated one-step CAP approach for preparation of surface-confined, crosslinked polymer films. 261 As a proof of concept for the confined polymerization of macromolecular crosslinkers on pretreated surfaces, ring-opening metathesis polymerization was used. In this case, rutheniumalkylidene initiators were deposited on the surface to promote the polymerization of norbornene-bearing polymers like poly(methyl methacrylate) (PMMA), poly(2-hydroxyethyl acrylate) or dextrin.…”

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confidence: 99%

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

et al. 2013

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Materials fabrication with nanoscale structural precision based on bottom-up-type self-assembly has become more important in various current disciplines in chemistry including materials chemistry, organic chemistry, physical chemistry, analytical chemistry, biochemistry, colloid and surface chemistry, and supramolecular chemistry. Although the design of new materials based on nanoscale self-assembly is anticipated as a key concept, preparing complete three-dimensional structures at nanoscale precision remains a difficult target using current technologies. Rather, dimension-reduced approaches such as layering of two-dimensional nanostructures into precisely controlled lamellar nanomaterials are currently achievable. In particular, layer-by-layer (LbL) assembly is known as a highly versatile method for fabrication of controlled layered structures from various kinds of component materials using very simple, inexpensive, and rapid procedures. Therefore, fabrication of multilayer films through the LbL deposition process has attracted growing interest from various research communities. The high versatility and flexibility of LbL assembly is continuously creating new concepts, new materials, new procedures, and new applications. In this highlight review, we focus on nanoarchitectonics by LbL assembly. After an initial introduction on the invention and a brief history of the LbL assembly technique, innovations and the evolution of the technique are described based mainly on recent examples, which are categorized into two sections: (i) developments in methodology (technical, material, and phenomenological aspects with expansion of concept) and (ii) progress in applications (physical, chemical/biochemical, and biomedical applications).

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confidence: 99%

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

et al. 2013

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“…Initially, all mesoporous silica particles (7 μm in diameter) were functionalized with an initiating layer via deposition of allyl‐PEI, followed by catalyst C1 immobilization. To effect the CAP ROMP process, the initiator‐functionalized particles were then dispersed in a solution of macrocross‐linker P1 or P2 .…”

Section: Resultsmentioning

confidence: 99%

“…20%) where distillation‐precipitation polymerization was employed in the fabrication of cross‐linked films . To increase the P1 film thickness on the particles, a process of reinitiation was performed . Firstly, the film made after one CAP step was replenished with initiator C1 through reaction with the terminal alkene, as well as the “left‐over” unreacted norbornene, in the film, followed by exposure to macrocross‐linker P1 under identical conditions to the first CAP reaction (Figure a).…”

Section: Resultsmentioning

confidence: 99%

“…Herein, the viability of the continuous assembly of polymers (CAP) approach to produce CSPs with engineered features is investigated. The CAP approach utilizes controlled polymerization methodologies to mediate the continuous growth of macrocross‐linkers – (bio)macromolecules functionalized with pendent polymerizable moieties – from initiator‐functionalized surfaces to form surface‐confined, cross‐linked films in a single‐step . As the CAP films are cross‐linked, the resulting CSPs are expected to be robust towards a wide range of HPLC eluents.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Chiral Stationary Phases via Continuous Assembly of Polymers for Resolution of Enantiomers by Liquid Chromatography

Guntari

Nam

Pranata

et al. 2014

Macro Materials & Eng

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Precise stereochemical determination of chiral molecules is highly important, especially in the pharmaceutical industry where one enantiomer may have a therapeutic effect while the other has detrimental effects. Herein, the continuous assembly of polymers (CAP) mediated via ringopening metathesis polymerization (ROMP) is used to fabricate immobilized-type chiral stationary phases (CSPs) -as cross-linked thin films on solid supports -for enantiomeric separation. Optically active polysaccharides (chitosan and amylose) with aromatic substituents were pre-functionalized with pendent norbornene groups and subsequently employed as macrocross-linkers in the CAP ROMP process, building cross-linked films from initiator-functionalized mesoporous silica particles. The immobilized cross-linked films on mesoporous silica particles can act as CSPs. Therefore, the chiral recognition abilities of the CSPs were explored by liquid chromatography (LC). It was found that CSPs with higher amount of polysaccharide cross-linked films -made from multiple CAP reactionshave better chiral separation capabilities. This work demonstrates the versatility of the CAP approach to fabricate CSPs to tailor specific separation needs.

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“…Continuous assembly of polymers (CAP) method is one of the approaches to polymerize macrocross-linkers (bio) macromolecules with pendant polymerizable moieties. CAP method is an one step nano scale crosslinking approach [19]. When this same approach is conciliated with ring-opening metathesis polymerization (CAP ROMP ), stability increases.…”

Section: Uv Responsivementioning

confidence: 99%

Responsive Systems in Food Packaging

Purkayastha

Biswal

Saha

2017

J Package Technol Res

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Responsive packaging systems can adapt to surrounding environments or react to stimuli in the food and/or regulate transport of encapsulated actives/nutrition in presence of external stimuli. It also converts chemical and biochemical signals into optical, electrical, mechanical signals etc. To allow real time food safety and quality monitoring along with extension of shelf-life of food products. These packaging systems are currently an emerging area in food packaging research and playing an increasingly important part in a diverse range of applications, such as nutrition delivery in controlled fashion, 'on demand' active delivery, spoilage indicators etc. This paper gives an overview of recent developments and challenges on the applications of stimuli-responsive materials towards food packaging area. We also highlight the future directions to convert research outcome into commercial products.

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Nanoengineered Films via Surface‐Confined Continuous Assembly of Polymers

Abstract: A highly generalizable, surface‐confined, continuous polymer assembly process, amenable to various substrates, reaction conditions and macromolecules, enables the synthesis of a range of nanoscale supported and freestanding cross‐linked polymer films.

Cited by 43 publications

References 34 publications

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

Fabrication of Chiral Stationary Phases via Continuous Assembly of Polymers for Resolution of Enantiomers by Liquid Chromatography

Responsive Systems in Food Packaging

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