Reconfigurable responsive structures assembled from magnetic Janus particles

Smoukov, Stoyan K.; Gangwal, Sumit; Márquez, Manuel; Velev, Orlin D.

doi:10.1039/b814304h

Cited by 233 publications

(249 citation statements)

References 50 publications

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“…[147] Only very recently has interest shifted to the study of magnetically-modified Janus particles. [65] For example, Smoukov, et al, [148] study the assembly behavior of PVDmodified (iron-capped) polystyrene beads in magnetic fields. They investigated two different layer thicknesses [123,124,129,130] Particle models with 2-6 patches.…”

Section: Field-induced Assembly Of Janus and Patchy Particlesmentioning

confidence: 99%

Fabrication, Assembly, and Application of Patchy Particles

Pawar

Kretzschmar

2010

Macromol. Rapid Commun.

452

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: Field-induced Assembly Of Janus and Patchy Particlesmentioning

confidence: 99%

Fabrication, Assembly, and Application of Patchy Particles

Pawar

Kretzschmar

2010

Macromol. Rapid Commun.

452

411

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“…In addition, there are directional methods that are being used to form chemical patches on surface of particles such as microcontact printing [387][388], etching [389], laser- [390] or UV-induced deposition [391], projection lithography [392], metal deposition [393][394] and temporary masking one side of particles while modifying the other [395][396]. Most of these methods are waiting to be explored for porous particles.…”

Section: Surface-and Pore-size-specific Functionalizationmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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“…[7][8][9][10] Colloidal polymer systems have multiple advantages, including being small enough to be influenced by Brownian forces yet large enough to enable studies with 'single molecules' using ordinary light microscopy. Various methods have been used to assemble colloidal polymer chains, including methods that produce anisotropic patches that act as binding sites [11][12][13][14] and the use of anisotropic dipolar interactions in a directed assembly of colloids using either magnetic [15][16][17][18][19] or electric fields. [20][21][22] These structures can be considered a concrete representation of the theoretical 'bead-spring' system introduced by Rouse and Zimm in the 1950s to describe linear polymer chains.…”

Section: Introductionmentioning

confidence: 99%

Directing Assembly of DNA-Coated Colloids with Magnetic Fields To Generate Rigid, Semiflexible, and Flexible Chains

et al. 2014

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We report the formation of colloidal macromolecules consisting of chains of micron-sized paramagnetic particles assembled using a magnetic field and linked with DNA. The interparticle spacing and chain flexibility was controlled by varying the magnetic field strength and the linker spring constant. Variations in the DNA lengths allowed for the generation of chains with an improved range of flexibility, as compared to previous studies. These chains adopted the rigid-rod, semi-flexible, and flexible conformations that are characteristic of linear polymer systems. These assembly techniques were investigated to determine the effects of the nanoscale DNA linker properties on the properties of the microscale colloidal chains. With stiff DNA linkers (564 base pairs) the chains were only stable at moderate to high field strengths and produced rigid chains. For flexible DNA linkers (8000 base pairs), high magnetic field strengths caused the linkers to be excluded from the gap between the particles, leading to a transition from very flexible chains at low field strengths to semi-flexible chains at high field strengths. In the intermediate range of linker sizes, the chains exhibited predictable behavior, demonstrating increased flexibility with longer DNA linker length or smaller linking field strengths. This study provides insight into the process of directed assembly using magnetic fields and DNA by precisely tuning the components to generate colloidal analogues of linear macromolecular chains.

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Reconfigurable responsive structures assembled from magnetic Janus particles

Cited by 233 publications

References 50 publications

Fabrication, Assembly, and Application of Patchy Particles

Fabrication, Assembly, and Application of Patchy Particles

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Directing Assembly of DNA-Coated Colloids with Magnetic Fields To Generate Rigid, Semiflexible, and Flexible Chains

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