Construction of a supramolecular network with active functions and its self-organization

具有活性功能的超分子网络的构建及其自组织

• 批准号: 18540385
• 负责人: MIYAKAWA Kenji
• 金额: $ 2.39万
• 依托单位: Fukuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18540385/
• 关键词: self-organization; network; stochastic resonance; Belousov-Zhabotinsky reaction; BZ反応

We have prepared active elements involved an autonomous function by immobilizing the catalyst ruthenium (II) for Belousov-Zhabotinsky (BZ) reaction in microgels. First we investigated the characteristic of elements by varying control parameters, such as the composition and the temperature of the BZ solution. In order to investigate the effect of hierarchization on self-organization, we have constructed a two-dimensional network based on 10×10 of such elements. In this study, we tried to induce a novel self-organization in the excitable network subjected to an external noise. We have experimentally demonstrated that the coherence of noise-induced firings is improved and the optimal noise amplitude maximizing the coherence monotonically decreases with increasing the number of elements, i.e., the occurrence of array-enhanced coherence resonance (AECR). Furthermore, it is found that synchronization among oscillators which are barely coupled can be achieved via coherence resonance. Experimental observations are approximately reproduced in a numerical simulation with a forced Oregonator reaction-diffusion model.We have controlled the coherence of the autonomous network system by adding a feedback with a time delay τ to it. Here the optical method has been used in a feedback, since the present system is light-sensitive. We have investigated the spatial and temporal coherence of the autonomous oscillation, R and σ^2, as a function of a time delay τ and the coupling strength between elements k. We have demonstrated that both R and σ^2 periodically vary with τ . Furthermore, we have found that the coherence strongly depends on k, and is improved in the particular range of k.

我们制备了涉及自主功能的活性元素，通过将催化剂钌（II）固定在微凝胶中用于Belousov-Zhabotinsky（BZ）反应。首先，我们通过改变控制参数，如BZ溶液的成分和温度，研究了元素的特性。为了研究层次化对自组织的影响，我们构建了一个基于10×10个这样的元素的二维网络。在这项研究中，我们试图诱导一个新的自组织在可兴奋网络受到外部噪声。我们已经通过实验证明，噪声引起的放电的相干性得到改善，并且最大化相干性的最佳噪声幅度随着元件数量的增加而单调减小，即，阵列增强相干共振（AECR）的发生。此外，还发现几乎不耦合的振子之间的同步可以通过相干共振实现。在数值模拟中近似地再现了实验观测，采用强迫Oregonator反应-扩散模型，通过在自治网络系统中加入一个时滞为τ的反馈来控制系统的相干性，由于系统是光敏的，所以在反馈中采用了光学方法。我们研究了自发振荡的空间和时间相干性R和σ^2，它们是时间延迟τ和元素间耦合强度k的函数。我们已经证明了R和σ^2都随τ周期性地变化。此外，我们发现相干性强烈依赖于k，并且在特定的k范围内得到改善。

项目成果

Spatiotemporal Dynamics in a Linear Array of Coupled Coherence Resonance Oscillators

耦合相干共振振荡器线性阵列中的时空动力学

• 发表时间: 2006
• 期刊: Progress of Theoretical Physics 161
• 作者: K. Harada;K. Motomura;M. Ogata;K. Mori;and M. Mitsunaga;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi;Taiji Okano;Hiroto Adachi;Taiji Okano;Taiji Okano;Hiroto Adachi;Kenji Miyakawa
• 通讯作者: Kenji Miyakawa

Chain Structures of Microparticles Induced by Focusing a Laset Beam near the Liuid-air Interface of a Drolet

将激光束聚焦在液滴的液体-空气界面附近诱导的微粒链结构

• 发表时间: 2008
• 期刊: AIP Conference Proceedings CP982
• 作者: K. Harada;K. Motomura;M. Ogata;K. Mori;and M. Mitsunaga;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi
• 通讯作者: Hiroto Adachi

化学振動子ネットワークのダイナミクスのフィードバック制御

化学振荡器网络动力学的反馈控制

• 发表时间: 2007
• 作者: K. Harada;K. Motomura;M. Ogata;K. Mori;and M. Mitsunaga;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi;Taiji Okano;Hiroto Adachi;Taiji Okano;Taiji Okano;Hiroto Adachi;Kenji Miyakawa;Taiji Okano;Kenji Miyakawa;Taiji Okano;岡野 太治
• 通讯作者: 岡野 太治

Chain Structures of Microparticles Induced by Focusing a Laser Beam near the Liquid-air Interface of a Droplet

将激光束聚焦在液滴的液-气界面附近诱导产生的微粒链结构

• 发表时间: 2008
• 期刊: AIP Conference Proceedings CP982
• 作者: K. Harada;K. Motomura;M. Ogata;K. Mori;and M. Mitsunaga;Hiroto Adachi
• 通讯作者: Hiroto Adachi

Array-enhanced coherence resonance and phase synchronization in a two-dimensional array of excitable chemical oscillators

可激发化学振荡器二维阵列中的阵列增强相干共振和相位同步

• 发表时间: 2007
• 期刊: Physical Review E 76
• 作者: K. Harada;K. Motomura;M. Ogata;K. Mori;and M. Mitsunaga;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi;Hiroto Adachi;Taiji Okano
• 通讯作者: Taiji Okano