Transition between Collective Behaviors of Micromotors in Response to Different Stimuli

详细信息    查看全文

• 作者：Wentao Duan ; Ran Liu ; Ayusman Sen
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：January 30, 2013
• 年：2013
• 卷：135
• 期：4
• 页码：1280-1283
• 全文大小：349K
• 年卷期：v.135,no.4(January 30, 2013)
• ISSN：1520-5126

文摘

We report a Ag₃PO₄ microparticle system showing collective behaviors in aqueous medium. Transition between two emergent patterns, namely 鈥渆xclusion鈥?and 鈥渟chooling鈥? can be triggered by shift in chemical equilibrium upon the addition or removal of NH₃ or in response to UV light. The transitions are consistent with a self-diffusiophoresis mechanism resulting from ion gradients. The reported system is among the few examples of nanomotors that are based on a reversible nonredox reaction and demonstrates new design principles for micro/nanomotors. Potential applications of the reported system in logic gates, microscale pumping, and hierarchical assembly have been demonstrated.