Dynamics of a ratchet gear powered by an active granular bath

Jerez, Michael Jade Y.; Bonachita, Mike A.; Confesor, Mark Nolan P.

doi:10.1103/physreve.101.022604

Cited by 10 publications

(4 citation statements)

References 21 publications

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“…Rotation reversal of a ratchet gear was also observed in these baths of active particles [36]. In the previous works [29][30][31][32][33][34][35][36], the asymmetry of the gear is necessary to obtain the directional rotation. Recently, Liao and coworkers [37] have discovered that a gear can rotate in a bath of chiral active particles.…”

Section: Introductionmentioning

confidence: 80%

“…Lugo and coworkers reported an inverse λ-like transition in the dynamics of ratchet gears in an active bath of self-propelling rods [34]. Jerez and coworkers studied the dynamics of these ratchets and established that their angular velocity displayed a nonmonotonic dependence with particle concentration [35]. Rotation reversal of a ratchet gear was also observed in these baths of active particles [36].…”

Section: Introductionmentioning

confidence: 96%

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Chirality-induced directional rotation of a symmetric gear in a bath of chiral active particles

Zhu

et al. 2023

New J. Phys.

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We conduct a numerical study exploring the rotation of a symmetric gear driven by chiral particles in a two-dimensional box with periodic boundary conditions. The symmetric gear is submerged in a ‘sea’ of chiral active particles. Surprisingly, even though the gear is perfectly symmetric, the microscopic random motion of chiral active particles can be converted into macroscopic directional rotation of the gear. (i) In the case of zero alignment interaction, the direction of rotation of the gear is determined by the chirality of active particles. Optimal parameters (the chirality, self-propelled speed, and packing traction) exist, at which the rotational speed reaches its maximum value. (ii) When considering a finite alignment interaction, alignment interactions between particles play an important role in driving the gear to rotate. The direction of rotation is dictated by the competition between the chirality of active particles and the alignment interactions between them. By tuning the system parameters, we can observe multiple rotation reversals. Our findings are relevant to understanding how the macroscopic rotation of a gear connects to the microscopic random motion of active particles.

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Section: Introductionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 96%

Chirality-induced directional rotation of a symmetric gear in a bath of chiral active particles

Zhu

et al. 2023

New J. Phys.

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“…A large number of self-propelled particles constitute an active bath that significantly affects the structural and dynamical behaviors of immersed passive objects due to persistent collisions with the active particles. For example, in the active bath, the diffusion coefficient of the passive tracer can be orders of magnitude higher than that in the equilibrium thermal bath, 12 the non-symmetric objects can exhibit directional rotation, 13,14 and the efficiency of the Stirling-type heat engine will break through the Carnot limit. 15 Moreover, the active bath can give rise to unusual effective interactions between suspended passive objects 16 and unexpected self-assemblies.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of active noise on a rotor in an active granular bath

et al. 2022

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“…The three tracer beads labelled 1, 2 and 3 (frame 1) were tracked. Bead positions were obtained from the images using the centroid algorithm with tracking resolution of 0.1μm[31,32]. Fig.3(b) show the 3D-time series displacement of the three polyethylene beads for a period of 3800 sec showing an oscillatory behaviour.…”

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confidence: 99%

Atomic Force Microscopy Characterization of Polyacrylamide Substrate for Traction Force Application

Reserva,

Ohura,

Miyashiro

et al. 2023

SSP

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Atomic Force Microscopy (AFM) technology has ushered researchers to directly observe surface topology and the substrate mechanical properties using specialized probe. AFM is one of the microscopic techniques with the highest lateral resolution which can be employed in air or even in liquids. In this experiment, we characterized the local elastic properties of the polyacrylamide (PA) hydrogel using Atomic Force Microscopy (AFM). PA consists of huge units of an organic acrylamide monomers which can be saturated to form a highly water-swollen hydrogel. The hydrogel offers tunable density with a high degree of pliability which depends of its applications. Such applications of PA hydrogel can be in cell substrate studies and measurement of cell-generated forces. Our results with AFM measurement yielded force-distance curves were used to determine the elastic behaviour of the polyacrylamide (PA) hydrogel. Analysis has shown that 15% w/v PA hydrogel concentration has Young’s modulus, Yav=1608.9 ± 1.3 kPa (n=8) and transverse stiffness, Kav=88.7 ± 9.7 μN/nm (n=8) at Thus, elasticity measurements has provided useful insights for the future experiment on traction force microscopy with amoeboid organism.

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Dynamics of a ratchet gear powered by an active granular bath

Cited by 10 publications

References 21 publications

Chirality-induced directional rotation of a symmetric gear in a bath of chiral active particles

Chirality-induced directional rotation of a symmetric gear in a bath of chiral active particles

Experimental investigation of active noise on a rotor in an active granular bath

Atomic Force Microscopy Characterization of Polyacrylamide Substrate for Traction Force Application

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