“Remote” Fabrication via Three‐Dimensional Reaction‐Diffusion: Making Complex Core‐and‐Shell Particles and Assembling Them into Open‐Lattice Crystals

Wesson, Paul J.; Soh, Siowling; Klajn, Rafał; Bishop, Kyle J. M.; Gray, Timothy P.; Grzybowski, Bartosz A.

doi:10.1002/adma.200802964

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…In this case, if the "shells" of the particles are optically transparent, the "core" particles can be considered as non-close-packed simple cubic colloidal arrays. [141] 7. DNA-Directed Self-Assembly One special type of hydrogen-bonding interaction is found between complementary DNA base pairs.…”

Section: Linkage Of Particles With Anisotropic Shapesmentioning

confidence: 99%

Colloidal Assembly: The Road from Particles to Colloidal Molecules and Crystals

2010

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Colloidal particles may be considered as building blocks for materials, just like atoms are the bricks of molecules, macromolecules, and crystals. Periodic arrays of colloids (colloidal crystals) have attracted much interest over the last two decades, largely because of their unique photonic properties. The archetype opal structures are based on close-packed arrays of spheres of submicrometer diameter. Interest in structuring materials at this length scale, but with more complex features and ideally by self-assembly processes, has led to much progress in controlling features of both building blocks and assemblies. The necessary ingredients include colloids, colloidal clusters, and colloidal "molecules" which have special shapes and the ability to bind directionally, the control over short-range and long-range interactions, and the capability to place and orientate these bricks. This Review highlights recent experimental and theoretical progress in the assembly of colloids larger than 50 nm.

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Section: Linkage Of Particles With Anisotropic Shapesmentioning

confidence: 99%

Colloidal Assembly: The Road from Particles to Colloidal Molecules and Crystals

2010

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“…Fabrication of the gel particles , used in this work began with standard photolithography in SU8 photoresist followed by molding into poly(dimethyl siloxane), PDMS. The PDMS master thus prepared presented millimeter-sized, 1 mm deep wells, which defined particles’ shapes.…”

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confidence: 99%

Swarming in Shallow Waters

Soh

Branicki

Grzybowski

2011

J. Phys. Chem. Lett.

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Swarming is a unique manifestation of dynamic self-assembly (DySA) 1-3 in which self-propelling objects not only organize into dissipative structures but also perform collective motions. While swarms are ubiquitous in biological systems (bacteria 4,5 , fish 6 , ants 7,8 , etc.), the examples of artificial collective movers are largely limited to complex robotics systems 9,10. The chief difficulty in making simple components swarm is to engineer interactions that would propel these components while maintaining them at a distance from and in proper orientation with respect to one another. Here, we describe a hydrodynamic system in which swarming is mediated by asymmetric convection "rolls" around small, millimeter-sized gel particles floating at a water/air interface and emitting surface active chemicals. Remarkably, for thin water layers, these convective flows give rise to interparticle attractions that bring the particles close to-but not into contact-with one another. In collections of identical particles, this previously undescribed hydrodynamic interaction leads to the formation of high-symmetry, open-lattice, stationary structures. In contrast, particles of different shapes assemble into lower-symmetry, dynamic formations

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“…However, non‐close‐packed simple cubic arrays were realized through the natural assembly of composite cubes consisting of two types of materials, followed by selective etching in a controlled manner (Figure 26). In this case, if the “shells” of the particles are optically transparent, the “core” particles can be considered as non‐close‐packed simple cubic colloidal arrays 141…”

Section: Connecting Particlesmentioning

confidence: 99%

Application of Amorphous Boron Granulated With Hydroxyl‐ Terminated Polybutadiene in Fuel‐Rich Solid Propellant

Pang

Fan

Zhang

et al. 2011

Propellants Explo Pyrotec

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Amorphous boron powder granulated with HTPB, whose particle diameter could be controlled, was prepared by mechanical mill method. It was found that amorphous boron powder could be granulated with HTPB binder to form B‐HTPB particles, whose median particle diameter (d50) and specific surface area are in the range of 125.0–431.0 µm and 0.02–0.1 m2 g−1, respectively. The B‐HTPB particles could be dispersed in the HTPB binder with relatively low viscosity compared with direct addition of amorphous boron powder to the HTPB binder. The experimental results showed that the content of boron particles in a fuel‐rich propellant could be increased by addition of B‐HTPB particles and the combustion characteristics of the fuel‐rich solid propellant could be improved.

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“Remote” Fabrication via Three‐Dimensional Reaction‐Diffusion: Making Complex Core‐and‐Shell Particles and Assembling Them into Open‐Lattice Crystals

Cited by 13 publications

References 21 publications

Colloidal Assembly: The Road from Particles to Colloidal Molecules and Crystals

Colloidal Assembly: The Road from Particles to Colloidal Molecules and Crystals

Swarming in Shallow Waters

Application of Amorphous Boron Granulated With Hydroxyl‐ Terminated Polybutadiene in Fuel‐Rich Solid Propellant

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