Illumination-Controlled Communication And Synchronization Of The BZ Gels

Through the communication process between monomers,active substance can realize synchronization and then produce group behaviors and function.For example,the organelles realize communication through the transport process such as diffusion of signal molecules to realize the physiological processes including self-replicating,self-healing and self-assembly at the cellular level.In this paper,the general process of oscillatory synchronization is discussed with experiments and numerical simulation in the reaction-diffusion system of photosensitive Belosov-Zhabotinsky?BZ?reactive gel-solution reaction.It means that the process and mechanism of the oscillating reaction in the interval of a pair of gel blocks passes through the diffusion of signal molecules to realize synclironization.Firstly,experiments were carried out to explore the influence of various factors on the communication and synclironization of BZ gel.Applying the optical perturbation to one of the blocks to achieve the oscillation phase asynchrony,then measure the required time of the oscillation of the two blocks returning to the synergistic state to characterize the intensity of their communication and synclironization.The influence on the following factors are studied respectively for the recovery time of synergistic process :?1?Effect of light wavelengths;?2?Effect of different light intensities;?3?Effect of gap of the blocks;?4?Effect of the irradiation time of light.The results show that the intensity of communication and synclironization between the blocks increases with the decrease of the wavelength?658 nm,532 nm and 405 nm?of the light source.The time required for the recovery of the synclironization is shortened with the increase of the disturbance intensity and the recovery of the synclironization can be delayed with the increase of the block spacing until it can not be synergized.It is shown that the irradiation light promotes the synergistic intensity,and the synergistic ability of the gel is obviously attenuated with the pitch.In addition,the duration time of the irradiation light has a significant effect on synergistic recovery,indicating that a certain sustained duration is required through the diffusion of the reactant molecules?HBr O₂?.In this work,numerical simulation and analysis based on theories were conducted as follow:Firstly,for photosensitive BZ reaction,its dynamics mechanism,dynamical features and models were discussed.Specially,Oregonator model of photosensitive BZ reaction was derived by Gyrgyi-Field.During the simplification,it was found that Br MA variable cannot be eliminated adiabaticly.In addition,dynamics of light intensity modulation in the oscillations during photosensitive BZ reaction,such as light intensity-oscillation frequency correlation,reactant concentration-oscillation frequency correlation as well as extremum correlation between reactants concentration and oscillation catalyst concentration,were studied through modifying models.Secondly,after Oregonator model being derived by Gyrgyi-Field,diffusion system of BZ gommures-solution heterogeneous reaction was study.Specially,the dynamics and the laws of evolution of gommures from asynchronous oscillation to synergetic recovery were discussed,which were consistent with the experimental results.It is revealed that the self-catalyst?HBr O₂?is the signal molecule of the synclironization and the bromide ion has theinhibiting effect on the synclironization through reactant diffusion limit ideal experiments.In conclusion,this paper studied the communication between the photosensitive BZ block through the diffusion of the reactant molecules and the synchronization of the oscillation with experiments and mechanism simulation system.The results of the study contribute to design group behaviors based on the synchronization of the oscillation,including population co-oscillation of the fixed gel block and self-assembly of the BZ self-oscillating gel.