Granular ionic crystals in a small nutshell

Haeberle, Jan; Harju, Janni; Sperl, Matthias; Born, Philip

doi:10.1039/c9sm01272a

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…i) The whole field of charged active matter which unifies strongly coupled unscreened Coulomb systems 77 and active matter can be realized by charging granulates, either by tribo-electric effects and by preparing macroscopic charged particles 78 . This is possibly a better controlled charged system than that of charged active dusty plasmas which require nonequilibrium ionic fluxes.…”

Section: Perspectivesmentioning

confidence: 99%

Inertial effects of self-propelled particles: From active Brownian to active Langevin motion

Löwen

2020

The Journal of Chemical Physics

226

180

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Active particles which are self-propelled by converting energy into mechanical motion represent an expanding research realm in physics and chemistry. For micron-sized particles moving in a liquid ("microswimmers"), most of the basic features have been described by using the model of overdamped active Brownian motion. However, for macroscopic particles or microparticles moving in a gas, inertial effects become relevant such that the dynamics is underdamped. Therefore, recently, active particles with inertia have been described by extending the active Brownian motion model to active Langevin dynamics which include inertia. In this perspective article recent developments of active particles with inertia ("microflyers") are summarized both for single particle properties and for collective effects of many particles. There include: inertial delay effects between particle velocity and self-propulsion direction, tuning of the long-time self-diffusion by the moment of inertia, effects of fictitious forces in non-inertial frames, and the influence of inertia on motility-induced phase separation. Possible future developments and perspectives are also proposed and discussed.Invited perspective article for The Journal of Chemical Physics. arXiv:1910.13953v1 [cond-mat.soft]

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Section: Perspectivesmentioning

confidence: 99%

Inertial effects of self-propelled particles: From active Brownian to active Langevin motion

Löwen

2020

The Journal of Chemical Physics

226

180

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“…This idea is simple in principle. As grains collide, they charge and these charges can just add another attractive, and in contrast to van der Waals forces, long range force, which can be strong and very efficient to glue dust aggregates together into larger clusters (Marshall et al 2005;Lee et al 2015;Jungmann et al 2018;Matias et al 2018;Haeberle et al 2019;Steinpilz et al 2020a,b;Xiang et al 2021;Teiser et al 2021;.…”

Section: Detour On Collisional Chargingmentioning

confidence: 99%

Ionizing protoplanetary discs in pebble collisions

Wurm

Jungmann

Teiser

2022

Monthly Notices of the Royal Astronomical Society: Letters

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We introduce collisions of solids as a new and efficient ionization mechanism for gas in protoplanetary disks, which especially operates in the dense midplane of protoplanetary disks. This idea is sparked by laboratory experiments where we found that charge, which is exchanged by grains in mutual collision (tribocharging), is not tied to their surfaces alone. As kind of collateral effect, charges also become entrained into the gas phase, i.e. collisions ionize the protoplanetary disk. Therefore, solids are not only sinks of charges in disks but also sources. A first estimate shows that ionization rates in the midplane at 1 AU in the range of $10^{-19} ... 10^{-15} \rm \, s^{-1}$ seem feasible depending on the assumption of rather calm or highly turbulent conditions with radial particle pile up.

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The significance of multipole interactions for the stability of regular structures composed from charged particles

Lindgren,

Avis,

Miller

et al. 2024

Journal of Colloid and Interface Science

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Granular ionic crystals in a small nutshell

Abstract: Binary mixtures of granular particles take arrangements akin ionic crystals by triboelectric charging in incommensurate containers, but not in commensurate containers.

Cited by 3 publications

References 31 publications

Inertial effects of self-propelled particles: From active Brownian to active Langevin motion

Inertial effects of self-propelled particles: From active Brownian to active Langevin motion

Ionizing protoplanetary discs in pebble collisions

The significance of multipole interactions for the stability of regular structures composed from charged particles

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