2016
DOI: 10.1002/ange.201609971
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Periodic Oscillatory Motion of a Self‐Propelled Motor Driven by Decomposition of H2O2 by Catalase

Abstract: As elf-propelled motor driven by the enzymatic reaction of catalase adsorbed onto afilter paper floating on an aqueous solution of H 2 O 2 was used to study nonlinear behavior in the motorsm otion. An increase in the concentration of H 2 O 2 resulted in ac hange from no motion to irregular oscillatory motion, periodic oscillatory motion, and continuous motion. The mechanisms underlying oscillation and mode bifurcation are discussed based on experimental results on O 2 bubblef ormation and growth on the undersi… Show more

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Cited by 14 publications
(13 citation statements)
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“…The colloidal waves reported here exhibit autonomous, periodic, and local flows that mesoscopically transport colloidal objects that are chemically coupled and is therefore noticeably different from other systems that may appear superficially similar. First, even though there have been reports of chemically propelled microswimmers with oscillating speeds, enabled by the periodic coalescence, growth, and release of large O 2 bubbles ( 51 ), by incorporating BZ reactions in droplets ( 52 ) or by periodic changes in the buoyancy during the decomposition of hydrogen peroxide ( 53 ), none generates colloidal waves likely because they lack an appropriate coupling mechanism in the population.…”
Section: Discussionmentioning
confidence: 99%
“…The colloidal waves reported here exhibit autonomous, periodic, and local flows that mesoscopically transport colloidal objects that are chemically coupled and is therefore noticeably different from other systems that may appear superficially similar. First, even though there have been reports of chemically propelled microswimmers with oscillating speeds, enabled by the periodic coalescence, growth, and release of large O 2 bubbles ( 51 ), by incorporating BZ reactions in droplets ( 52 ) or by periodic changes in the buoyancy during the decomposition of hydrogen peroxide ( 53 ), none generates colloidal waves likely because they lack an appropriate coupling mechanism in the population.…”
Section: Discussionmentioning
confidence: 99%
“…For example, self-propelled objects have been studied as potential carriers to transport materials or themselves to a target location in a confined space, mimicking the behavior of bacteria. Most self-propelled objects exhibit monotonous or random motion because the direction of motion is determined by the anisotropy of the motor shape or by the external field. On the other hand, biological motors, such as bacteria, can flexibly change the character of their motion while responding to the physicochemical environment, and their characteristic behavior, such as chemotaxis, is induced consequently. , Designing artificial self-propelled systems that mimic biological motors can help us to understand how the variety and autonomy of self-propelled motion seen in nature emerge. The coupling of self-propelled motion with other nonlinear phenomena, ,, e.g., spatiotemporal pattern formation, oscillation, bifurcation, and synchronization, is one of the available strategies to realize self-propelled motors with diversity and autonomy. ,, …”
Section: Introductionmentioning
confidence: 99%
“…6−21 The coupling of self-propelled motion with other nonlinear phenomena, 6,22,23 e.g., spatiotemporal pattern formation, oscillation, bifurcation, and synchronization, is one of the available strategies to realize self-propelled motors with diversity and autonomy. 6,21,24 We have investigated simple self-propelled objects for which the difference in the surface tension on water is the driving force, 6,25 which exhibits a qualitative change in the character of their motion. 6,26−30 Here, we focus our attention on a system in which the temperature can cause such qualitative changes.…”
Section: Introductionmentioning
confidence: 99%
“…Chemical reactions are often used to power colloidal motors via concentration gradients or bubbles, , and the vast pool of accessible chemical reactions hint at the possibility of time-variant motor activity. Indeed, simple chemical reactions, such as the decomposition of H 2 O 2 and the consequent nucleation of oxygen bubbles, have been reported to nudge colloids into apparent “periodic” or “oscillatory” motion. , Moreover, nonlinear chemical systems, such as Belousov–Zhabotinsky (BZ) reactions and iodine clock, offer a more exciting and complex playground. However, although oscillating BZ gels, droplets, and beads demonstrating interesting patterns and collective behaviors have been reported, most of these systems lack asymmetries that enable directional motion and do not operate at micro- or even nanoscales.…”
mentioning
confidence: 99%