studies on self-oscillating functional systems

利用化学振荡，我们已经成功地制造了功能系统，可以在没有任何外部刺激的情况下进行自发开关。通过pH振荡器与pH响应性金属纳米颗粒的耦合，在CSTR条件下，表面等离子体激元模式和孤立模式之间的光学性质出现了自主振荡（即自主切换）。此外，我们还成功地在纳米通道中的自主质量传输之间的耦合的pH波的传播，这是由反应扩散现象和纳米通道驱动。所有这些结果表明，利用生物学中自振荡的起源--非线性化学反应，可以很好地创造出一个不需要施加物理能量就能进行自振荡的人工系统。

By using chemical oscillation, we have succeeded in fabricating functional systems that can undergo spontaneous switching without any external stimuli. With coupling between pH oscillator and pH-responsive metal nanoparticles, autonomous oscillation (in other word autonomous switching) in optical properties between associated surface plasmon and isolated surface plasmon modes was appeared under CSTR condition. Furthermore, we have also succeeded in an autonomous mass transport in nanochannel by coupling between pH-wave propagation which is driven by reaction-diffusion phenomenon and nanochanel. All these results indicate that the use of non-linear chemical reacion that is the origin of self-oscillation in biology is quite useful to create an artificial system that can undergo autonomous oscillation without applying physical energy.