Self-assembling of non-Brownian magnetized spheres

Carvente, O.; Peraza‐Mues, Gonzalo; Salazar, Michael R.; Ruiz‐Suárez, J. C.

doi:10.1007/s10035-012-0333-4

Cited by 12 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lumay and Vandewalle [16] explored the properties of a granular packing submitted to a vertical magnetic field: the beads are organized such that low packing fractions can be reached. In another experiment, Carvente et al [17] obtained denser self-assembled systems using magnetized spheres. In the dilute limit, Falcon et al [18] experimented random magnetic forcing of a granular gas.…”

Section: Introductionmentioning

confidence: 99%

Magnetic ghosts and monopoles

Vandewalle

Dorbolo

2014

New J. Phys.

View full text Add to dashboard Cite

While the physics of equilibrium systems composed of many particles is well known, the interplay between small-scale physics and global properties is still a mystery for athermal systems. Non-trivial patterns and metastable states are often reached in those systems. We explored the various arrangements adopted by magnetic beads along chains and rings. Here, we show that it is possible to create mechanically stable defects in dipole arrangements keeping the memory of dipole frustration. Such defects, nicknamed 'ghost junctions', seem to act as macroscopic magnetic monopoles, in a way reminiscent of spin ice systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Magnetic ghosts and monopoles

Vandewalle

Dorbolo

2014

New J. Phys.

View full text Add to dashboard Cite

show abstract

“…Although inter-particle collisions will lead to overall energy dissipation throughout a system of particles, as long as the total energy input to the system is greater than the rate of dissipation, the necessary freedom for erratic and exploratory particle motion is achieved. 20,37,38 Exploring this balance between fluctuational energy (either natural or externally applied) and dissipation has allowed Klotsa and Jack to model the equilibrium dynamics of colloidal systems. 39 Their work describes kinetically trapped states at different time stages throughout the crystallization process and supports the suggestion of Whitesides and Boncheva, describing that particles must be able to adjust their positioning in order to effectively assemble into a periodically ordered structure.…”

Section: Fabrication Methods For Creating Crystals From Spherical Non...mentioning

confidence: 99%

“…The formation of liquid bridges between the particles alters the interparticle interactions due to the introduction of capillary forces and helps induce different crystalline orientations. 27,37 Similarly to the open systems we have primarily discussed, adjusting the container properties appropriately also provides design control over the resulting crystal orientation when creating crystals in a closed system (where the particles are added to the container prior to vibrational annealing). 27,63 Low ratios of the container diameter to particle diameter have been shown to induce crystallization and increase the overall packing fraction.…”

Section: Packing Density As a Function Of The Crystal Fabrication Met...mentioning

confidence: 99%

Scaling up self-assembly: bottom-up approaches to macroscopic particle organization

et al. 2015

View full text Add to dashboard Cite

This review presents an overview of recent work in the field of non-Brownian particle self-assembly. Compared to nanoparticles that naturally self-assemble due to Brownian motion, larger, non-Brownian particles (d > 6 μm) are less prone to autonomously organize into crystalline arrays. The tendency for particle systems to experience immobilization and kinetic arrest grows with particle radius. In order to overcome this kinetic limitation, some type of external driver must be applied to act as an artificial "thermalizing force" upon non-Brownian particles, inducing particle motion and subsequent crystallization. Many groups have explored the use of various agitation methods to overcome the natural barriers preventing self-assembly to which non-Brownian particles are susceptible. The ability to create materials from a bottom-up approach with these characteristics would allow for precise control over their pore structure (size and distribution) and surface properties (topography, functionalization and area), resulting in improved regulation of key characteristics such as mechanical strength, diffusive properties, and possibly even photonic properties. This review will highlight these approaches, as well as discuss the potential impact of bottom-up macroscale particle assembly. The applications of such technology range from customizable and autonomously self-assembled niche microenvironments for drug delivery and tissue engineering to new acoustic dampening, battery, and filtration materials, among others. Additionally, crystals made from non-Brownian particles resemble naturally derived materials such as opals, zeolites, and biological tissue (i.e. bone, cartilage and lung), due to their high surface area, pore distribution, and tunable (multilevel) hierarchy.

show abstract

“…[10][11][12][13][14][15][16] The emerging crystalline structures were found to minimize the gravitational potential energy and the kinetic energy from agitation for rectangular container geometries. 10,13,17 These findings suggest that crystallization of granular spheres into densest packings by gravity forms a deep energy minimum, that is hard to leave by interactions emerging from opposite charging. Emergence of order by triboelectric charging may consequently be best observed in a container that does not allow for crystallization by gravity, as the order process does not have to compete the formation of a densest packing.…”

Section: Introductionmentioning

confidence: 96%