Fabrication of multiphasic and regio-specifically functionalized PRINT<sup>®</sup>particles of controlled size and shape

Zhang, H; Nunes, Janine K.; Gratton, Stephanie E. A.; Herlihy, Kevin P.; Pohlhaus, Patrick D.; DeSimone, Joseph M.

doi:10.1088/1367-2630/11/7/075018

Cited by 62 publications

(71 citation statements)

References 39 publications

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“…Recent advances in the field continuously broaden the versatility of new techniques towards fabrication of patchy particles. They include particle replication in non-wetting templates, [102] polyamine-guided synthesis of anisotropic multicompartment particles, [103] cooperative assembly of block copolymers with deformable interfaces, [104] coalescence of liquid protrusions on polystyrene particles [105] and a double m-printing approach. [106] However, a single method that can both be scaled to large particle volumes and at the same time give control over the accurate placement of patches has yet to be found.…”

Section: Capillary Fluid Flowmentioning

confidence: 99%

Fabrication, Assembly, and Application of Patchy Particles

Pawar

Kretzschmar

2010

Macromol. Rapid Commun.

444

411

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The site‐specific engineering of colloidal surfaces has provided a powerful approach to pushing the boundaries of today's materials research. The resulting surface‐anisotropic and patchy particles have become the center of vital research areas, ranging from the need for large‐scale fabrication techniques to exploring new applications of these materials. This Review summarizes patchy particle fabrication techniques, including but not limited to particle and nanosphere lithography and glancing‐angle deposition. The variety of existing patchy particle fabrication techniques is revealed and the need for a scalable approach to high‐volume patchy particle production is identified. Ongoing modeling efforts describing patchy particle interactions and properties are reviewed as potential predictive tools. Research endeavors that deal with the directed assembly of patchy particles in electric and magnetic fields, as well as with supraparticular assembly through chemical interactions, are discussed. The Review is concluded with a note on the future application of patchy particles as phoretic motors.magnified image

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Section: Capillary Fluid Flowmentioning

confidence: 99%

Fabrication, Assembly, and Application of Patchy Particles

Pawar

Kretzschmar

2010

Macromol. Rapid Commun.

444

411

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“…For example, electrically dipolar rods have been created experimentally by Zhang et al using PRINT which they found aligned in a head-to-tail fashion along an external electric field. 21 Kozek et al have synthesized nano-meter sized dipolar rods by coating a gold rod in silica and then attaching a magnetic overcoat to the silica layer.…”

Section: Introductionmentioning

confidence: 99%

The effect of charge separation on the phase behavior of dipolar colloidal rods

et al. 2016

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a Colloids with anisotropic shape and charge distribution can assemble into a variety of structures that could find use as novel materials for optical, photonic, electronic and structural applications. Because experimental characterization of the many possible types of multi-shape and multipolar colloidal particles that could form useful structures is difficult, the search for novel colloidal materials can be enhanced by simulations of colloidal particle assembly. We have simulated a system of dipolar colloidal rods at fixed aspect ratio using discontinuous molecular dynamics (DMD) to investigate how the charge separation of an embedded dipole affects the types of assemblies that occur. Each dipolar rod is modeled as several overlapping spheres fixed in an elongated shape to represent excluded volume and two smaller, embedded spheres to represent the charges that make up the extended dipole. Large charge separations predominately form structures where the rods link head-to-tail while small charge separations predominately form structures where the rods stack side-by-side. Rods with small charge separations tend to form dense aggregates while rods with large charge separations tend to form coarse gel-like structures. Structural phase boundaries between fluid, string-fluid, and ''gel'' (networked) phases are mapped out and characterized as to whether they have global head-to-tail or global side-by-side order. A structural coarsening transition is observed for particles with large charge separations in which the head-tail networks thicken as temperature is lowered due to an increased tendency to form side-by-side structures. Triangularly connected networks form at small charge separations; these may be useful for encapsulating smaller particles.

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“…However, this method is largely ineffective at producing particles with chemical anisotropy or patterning, as the precursor liquid is simply isolated in a non-wetting template and then crosslinked in situ. Although one-dimensional striped particles have been generated 14 , the synthesis requires complex steps including multiple evaporation-refilling-crosslinking procedures, and the process cannot be applied to nonvolatile precursors.…”

mentioning

confidence: 99%

Non-polydimethylsiloxane devices for oxygen-free flow lithography

Bong

Kim

et al. 2012

Nat Commun

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Flow lithography has become a powerful particle synthesis technique. Currently, flow lithography relies on the use of polydimethylsiloxane microchannels, because the process requires local inhibition of polymerization, near channel interfaces, via oxygen permeation. The dependence on polydimethylsiloxane devices greatly limits the range of precursor materials that can be processed in flow lithography. Here we present oxygen-free flow lithography via inert fluid-lubrication layers for the synthesis of new classes of complex microparticles. We use an initiated chemical vapour deposition nano-adhesive bonding technique to create nonpolydimethylsiloxane-based devices. We successfully synthesize microparticles with a subsecond residence time and demonstrate on-the-fly alteration of particle height. This technique greatly expands the synthesis capabilities of flow lithography, enabling particle synthesis, using water-insoluble monomers, organic solvents, and hydrophobic functional entities such as quantum dots and single-walled carbon nanotubes. As one demonstrative application, we created near-infrared barcoded particles for real-time, label-free detection of target analytes.

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Fabrication of multiphasic and regio-specifically functionalized PRINT^®particles of controlled size and shape

Cited by 62 publications

References 39 publications

Fabrication, Assembly, and Application of Patchy Particles

Fabrication, Assembly, and Application of Patchy Particles

The effect of charge separation on the phase behavior of dipolar colloidal rods

Non-polydimethylsiloxane devices for oxygen-free flow lithography

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Fabrication of multiphasic and regio-specifically functionalized PRINT®particles of controlled size and shape

Cited by 62 publications

References 39 publications

Fabrication, Assembly, and Application of Patchy Particles

Fabrication, Assembly, and Application of Patchy Particles

The effect of charge separation on the phase behavior of dipolar colloidal rods

Non-polydimethylsiloxane devices for oxygen-free flow lithography

Contact Info

Product

Resources

About

Fabrication of multiphasic and regio-specifically functionalized PRINT^®particles of controlled size and shape