Soft Multifaced and Patchy Colloids by Constrained Volume Self-Assembly

Sosa, Chris; Li, Rui; Tang, Christina; Qu, Fengli; Niu, Sunny Xinchun; Bazant, Martin Z.; Prud'homme, Robert Krafft; Priestley, Rodney D.

doi:10.1021/acs.macromol.6b00708

Cited by 42 publications

(64 citation statements)

References 30 publications

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“…Using this technique, also termed FNP, Prud'homme and coworkers [33][34][35][36] have successfully incorporated hydrophobic drugs, fluorophores and inorganic NPs within block copolymer ensembles. In addition, Priestley and coworkers [37][38][39] have exploited FNP to process a series of polymer NPs ranging from homogeneous latex to patchy colloids. Fig.…”

Section: Resultsmentioning

confidence: 99%

Constrained-volume assembly of organometal confined in polymer to fabricate multi-heteroatom doped carbon for oxygen reduction reaction

Zhao

Priestley

et al. 2018

Sci. China Mater.

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Section: Resultsmentioning

confidence: 99%

Constrained-volume assembly of organometal confined in polymer to fabricate multi-heteroatom doped carbon for oxygen reduction reaction

Zhao

Priestley

et al. 2018

Sci. China Mater.

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“…ν is the Flory exponent, which depends on solvent conditions. For the polystyrene chains with a molecular weight of 16.5 kg/mol studied in the experiments, 11,22,23 our coarse-graining method leads to N b = 23. 11 In addition, the values of ν for different solvent conditions have been calculated from MD simulations and are presented in Fig.…”

Section: Simulation Model and Methodsmentioning

confidence: 99%

“…Compared to other competing methods, e.g., templating, 12,13 particle lithography, 14,15 or Self-Organized Precipitation (SORP), [16][17][18][19] FNP stands out as a one-step continuous process that operates at room temperature, consumes little energy, and has potential to scale up. In addition, it has also been demonstrated both by experiments and by simulations that it is able to access a wide range of structures, including Janus, core-shell, 20,21 patchy, [22][23][24] and concentric lamellar, 25 using different feed materials, with reliable control over particle size, morphology, and composition. This process can make use of electroneutral polymers with no external stabilizing agents.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale simulations of polymeric nanoparticle aggregation during rapid solvent exchange

Nikoubashman

Panagiotopoulos

2018

The Journal of Chemical Physics

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Using a multi-scale approach which combines both molecular dynamics (MD) and kinetic Monte Carlo (KMC) simulations, we study a simple and scalable method for fabricating charge-stabilized nanoparticles through a rapid solvent exchange, i.e., Flash NanoPrecipitation (FNP). This multi-scale approach is based on microscopic information from MD simulations and uses a KMC algorithm to access macroscopic length- and time scales, which allows direct comparison with experiments and quantitative predictions. We find good agreement of our simulation results with the experiments. In addition, the model allows us to understand the aggregation mechanism on both microscopic and macroscopic levels and determine dependence of nanoparticle size on processing parameters such as the mixing rate and the polymer feed concentration. It also provides an estimate for the characteristic growth time of nanoparticles in the FNP process. Our results thus give useful insights into tailoring the FNP technique for fabricating nanoparticles with a specific set of desirable properties for various applications.

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“…Quite recently, the flash nanoprecipitation process (FNP) was employed to form nanosized polymer blend microspheres, producing both Janus and patchy microspheres . In contrast to the methods described above, in which the phase separated polymer blend microspheres represent thermodynamically stable systems, FNP microspheres are kinetically frozen since the polymers are rapidly precipitated from solution upon the addition of a poor solvent .…”

Section: Controlling the Structures Of Phase Separated Polymer Microsmentioning

confidence: 99%

Fabrication of Nanostructured Composite Microspheres Based on the Self‐Assembly of Polymers and Functional Nanomaterials

Yabu

2019

Part & Part Syst Charact

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Achieving the specific properties required for the applications discussed above necessitates control over the morphologies of the polymer particles as well as the precise alignment of functional nanoparticles at particle interiors and surfaces. Studies using seed polymerization and related so-called second generation particle preparation techniques have succeeded in preparing polymer microspheres having anisotropic morphologies. [10] These techniques for the synthesis of nonspherical polymer microparticles are both powerful and practical, although the particle shape has been found to be greatly affected by the preparation conditions employed. These conditions involve numerous parameters, and so controlling the particle morphology remains challenging. In addition to first and second generation particle preparation technologies employing emulsion polymerization, recent studies have demonstrated the fabrication of nanostructured microspheres based on the phase separation of polymers. [11,12] These methods can be considered as the third generation of progress in this field and allow the tuning of particle morphologies in association with phase separation theories developed during prior work with bulk polymer blends, alloys, and composites. The alignment of nanoparticles in phase separated polymer microspheres could lead to nanostructured particles with many practical applications. Figure 1 presents some of the many methods developed for the synthesis of polymer microspheres. This diagram indicates representative existing approaches used to obtain controlled particle sizes, as well as specific phases in the interior and at the surfaces of such microspheres, and can be divided into two main categories; top-down and bottom-up. These two types of procedures differ with regard to the process used to form internal and surface structures. The polymerization or crosslinking of uniformly sized oil/water (O/W) or water/oil (W/O) emulsion droplets formed by microfluidic devices is a well-known topdown fabrication technique used to produce structured polymer microspheres with sizes on the scale of tens of micrometers. [13] Taking advantage of the laminar flow inside narrow capillaries, multiple phases can be formed in the interiors of the emulsion droplets, resulting in the formation of multiphase polymer microspheres. [14] In contrast, in the case of bottom-up approaches, the phase separation of polymers is used to create internal and surface nanostructures. The latter methods have received considerable attention because they permit size control on a variety of size scales as well as morphological tuning. [15] This Review examines recent developments in the morphological control of polymer microspheres fabricated via the phase separation of polymers as well as the alignment of functional nanoparticles inside microspheres prepared by so-called bottom-up synthesis techniques. Several methods for adjusting the internal and surface morphologies of polymer microspheres based on the phase separation of polymer blends and block copoly...

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Soft Multifaced and Patchy Colloids by Constrained Volume Self-Assembly

Cited by 42 publications

References 30 publications

Constrained-volume assembly of organometal confined in polymer to fabricate multi-heteroatom doped carbon for oxygen reduction reaction

Constrained-volume assembly of organometal confined in polymer to fabricate multi-heteroatom doped carbon for oxygen reduction reaction

Multi-scale simulations of polymeric nanoparticle aggregation during rapid solvent exchange

Fabrication of Nanostructured Composite Microspheres Based on the Self‐Assembly of Polymers and Functional Nanomaterials

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