Bifurcation of self-motion depending on the reaction order

Nagayama, Masaharu; Yadome, Masaaki; Murakami, Mai; Kato, Naoya; Kirisaka, Junko; Nakata, Satoshi

doi:10.1039/b815677h

Cited by 21 publications

(45 citation statements)

References 29 publications

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“…To investigate the influence of individual solutions on the driving force of motion, the surface tension was measured. The surface tensions for the solutions in Figures 1 a- [13,18,20] we propose a mechanism for the self-motion of BQ coupled with a NADPH system, as shown in Figure 3. For a low concentration of NADPH (0.5 mm) without an enzyme reaction, a BQ molecular layer, which can decrease the surface tension of the aqueous phase, develops from the solid disk.…”

Section: Discussionmentioning

confidence: 98%

“…The second term on the righthand side in Equation (1) corresponds to the viscous force of motion. The surface tension may be expressed as a function of C BQ by Equation (2): [18] www.chemphyschem.org…”

Section: Discussionmentioning

confidence: 99%

“…[20] Especially, we have already reported on mode change of continuous, intermittent, and no motion coupled with chemical reactions. [18][19][20] In addition, the essential features of self-motion could be qualitatively reproduced by a numerical calculation. [13,15,[17][18][19] Herein, we newly created an autonomous motor that includes a reverse system consisting of an enzyme reaction.…”

Section: Introductionmentioning

confidence: 97%

“…[18][19][20] In addition, the essential features of self-motion could be qualitatively reproduced by a numerical calculation. [13,15,[17][18][19] Herein, we newly created an autonomous motor that includes a reverse system consisting of an enzyme reaction. The mode change of self-motion of a benzoquinone disk was observed with or without the enzyme reaction and depending on the concentration of NADPH as a reductant.…”

Section: Introductionmentioning

confidence: 97%

“…temperature, surface tension, chemical stimuli, and the shape of the cell), [15][16][17] and chemical reactions (e.g. acid-base reaction [18] complex formation, [19] and redox reaction). [20] Especially, we have already reported on mode change of continuous, intermittent, and no motion coupled with chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

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Mode Change in the Self‐Motion of a Benzoquinone Disk Coupled with a NADPH System

et al. 2011

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The self-motion of a benzoquinone (BQ) disk on NADPH was investigated as the coupling of an autonomous motor and an enzyme reaction. In the absence of the enzyme reaction, features of motion changed depending on the concentration of NADPH, that is, continuous motion→ intermittent oscillatory motion→ no motion. When the reverse reaction from NADP(+) to NADPH was introduced into the system with the addition of an enzyme reaction, continuous motion changed to intermittent oscillatory motion with small amplitude. The mechanism of this mode change is discussed in relation to the surface tension as a driving force and the time course of UV spectra as a window to the progress of the reaction. Characteristic features of the mode change were qualitatively reproduced by a numerical calculation.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Mode Change in the Self‐Motion of a Benzoquinone Disk Coupled with a NADPH System

et al. 2011

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Evolution of Self‐Propelled Objects: From the Viewpoint of Nonlinear Science

Suematsu

Nakata

2018

Chemistry A European J

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103

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A variety of moving objects driven by chemical energy have been reported. In this Minireview, we focus on self-propelled objects driven by interfacial tension and explain three types of basic mechanisms for such self-propelled motion, that is, driven by a) surface tension difference, b) contact angle difference, and c) axisymmetric swirling flow in a droplet. Simple behavior induced from the basic mechanisms is then extended by coupling to a chemical reaction or increasing the number of moving objects. Even though the chemicals used here are still simple, the extended systems could show characteristic nonlinear behavior, such as reciprocating motion, oscillatory motion, and spatiotemporal pattern formation. Combining the dynamical information about these characteristic motions with the knowledge of molecular structures will lead to the development of more advanced self-propelled objects. We believe this Minireview can help chemists in investigating self-propelled objects displaying various functional motions observed in a biological system.

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Reciprocating Motion of a Self‐Propelled Object on a Molecular Layer

Nakata¹,

Miyaji²,

Sato³

et al. 2012

ChemPhysChem

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The mode change of a simple autonomous motor depending on the nature of a monolayer on water is investigated. A camphor disk is floated on a molecular layer of N-stearoyl-p-nitroaniline (C(18)ANA), which gives a surface-pressure (π)-area per molecule (A) isotherm with a local maximum and a local minimum. The nature of the camphor motion changes depending on A, and in particular, reciprocating motion is observed at a lower A while cutting out its own trajectory of motion. The characteristic motion of a camphor disk depending on A is discussed in relation to the π-A isotherm of C(18)ANA and the influence of the molecular interaction between molecules on the driving force of motion.

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Bifurcation of self-motion depending on the reaction order

Cited by 21 publications

References 29 publications

Mode Change in the Self‐Motion of a Benzoquinone Disk Coupled with a NADPH System

Mode Change in the Self‐Motion of a Benzoquinone Disk Coupled with a NADPH System

Evolution of Self‐Propelled Objects: From the Viewpoint of Nonlinear Science

Reciprocating Motion of a Self‐Propelled Object on a Molecular Layer

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