Collective behavior of inanimate boats

Suematsu, Nobuhiko J.; Nakata, Satoshi; Awazu, Akinori; Nishimori, Hiraku

doi:10.1103/physreve.81.056210

Cited by 82 publications

(96 citation statements)

References 33 publications

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“…The inanimate system composed of camphor boats in an annular water channel [19] offers an interesting possibility for experimental verification of our results.…”

Section: Discussionsupporting

confidence: 62%

“…An interesting artificial system, which has many properties similar to the OV traffic model, was proposed quite recently in Ref. [19] where an inanimate system composed of camphor boats in an annular water channel was studied and several modes of collective motion were observed. The boats move on the water and interact with each other through the concentration of the camphor molecules on the water surface.…”

Section: Introductionmentioning

confidence: 99%

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Controlling traffic jams by time modulating the safety distance

et al. 2013

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“…The inanimate system composed of camphor boats in an annular water channel [19] offers an interesting possibility for experimental verification of our results.…”

Section: Discussionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Controlling traffic jams by time modulating the safety distance

et al. 2013

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“…On the other hand, a symmetric camphor disk can move in a certain direction that is determined by the initial condition or fluctuations, and it can be regarded as a self-propelled particle without embedded asymmetry. Camphor particles have also been used to study various kinds of behavior of self-propelled particles such as jamming [21,22], cooperative motion [23][24][25], and nonequilibrium distribution of velocities [26]. The motion caused by the spontaneous symmetry breaking is described in terms of bifurcations.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the size of a camphor-driven rotor and its angular velocity

et al. 2017

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We consider a rotor made of two camphor disks glued below the ends of a plastic stripe. The disks are floating on a water surface and the plastic stripe does not touch the surface. The system can rotate around a vertical axis located at the center of the stripe. The disks dissipate camphor molecules. The driving momentum comes from the nonuniformity of surface tension resulting from inhomogeneous surface concentration of camphor molecules around the disks. We investigate the stationary angular velocity as a function of rotor radius ℓ. For large ℓ the angular velocity decreases for increasing ℓ. At a specific value of ℓ the angular velocity reaches its maximum and, for short ℓ it rapidly decreases. Such behaviour is confirmed by a simple numerical model. The model also predicts that there is a critical rotor size below which it does not rotate. Within the introduced model we analyze the type of this bifurcation.

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“…The autonomous motions of the camphor boat with one-dimensional motion can be expressed by a onedimensional Newtonian equation of motion, 15,61 …”

Section: Self-propelled Motions Of a Camphor Boat And An Alcohol Dropletmentioning

confidence: 99%

“…Such systems, called dissipative dynamic systems, occur, for example, under macroscopic agitation, during the flip-motion of a liquid/liquid interface, [3][4][5][6][7][8] or when objects display various modes of motion. [9][10][11][12][13][14][15][16][17][18] The BelousovZhabotinsky (BZ) reaction, which generates chemical oscillations in a bulk material, also produces sophisticated spatio-temporal patterns in an unstirred system. [19][20][21][22][23][24][25] Interfacial tension and its spatial distribution are key properties in these non-equilibrium and non-linear phenomena, since they govern molecular transport.…”

Section: Introductionmentioning

confidence: 99%

Quasi-elastic Laser Scattering for Measuring Inhomogeneous Interfacial Tension in Non-equilibrium Phenomena with Convective Flows

2014

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An inhomogeneous distribution of interfacial tension can induce different types of non-equilibrium spontaneous motion at the interface by convective flow, or by the solutal Marangoni effect. Several applications of the quasi-elastic laser scattering (QELS) method used to study these effects are presented here. The relationship between the interfacial tension and the non-equilibrium phenomena has been verified experimentally for each application. In a water/nitrobenzene oscillatory system with continuous surfactant addition to the interface, the local adsorption of surfactants at the interface has been demonstrated and shown to be strongly related to the presence of electrolytes. In a donor/membrane/acceptor system, the dual-beam QELS method shows that surfactant adsorption at the membrane/acceptor interface is responsible for oscillations in the electric potential. The differences in the adsorption/desorption behavior of metal complex catalysts between air/liquid and liquid/liquid interfaces were considered in the propagating chemical waves of the BelousovZhabotinsky reaction. We successfully measured the distribution of interfacial tension around a self-propelled camphor boat and an alcohol droplet floating on an aqueous phase, and compared the mechanisms of their motion.

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Collective behavior of inanimate boats

Cited by 82 publications

References 33 publications

Controlling traffic jams by time modulating the safety distance

Controlling traffic jams by time modulating the safety distance

Relationship between the size of a camphor-driven rotor and its angular velocity

Quasi-elastic Laser Scattering for Measuring Inhomogeneous Interfacial Tension in Non-equilibrium Phenomena with Convective Flows

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