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Non‐Equilibrium Assembly of Light‐Activated Colloidal Mixtures
Advanced Materials ( IF 27.4 ) Pub Date : 2017-06-20 , DOI: 10.1002/adma.201701328 Dhruv P. Singh 1 , Udit Choudhury 1, 2 , Peer Fischer 1, 3 , Andrew G. Mark 1
Advanced Materials ( IF 27.4 ) Pub Date : 2017-06-20 , DOI: 10.1002/adma.201701328 Dhruv P. Singh 1 , Udit Choudhury 1, 2 , Peer Fischer 1, 3 , Andrew G. Mark 1
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The collective phenomena exhibited by artificial active matter systems present novel routes to fabricating out‐of‐equilibrium microscale assemblies. Here, the crystallization of passive silica colloids into well‐controlled 2D assemblies is shown, which is directed by a small number of self‐propelled active colloids. The active colloids are titania–silica Janus particles that are propelled when illuminated by UV light. The strength of the attractive interaction and thus the extent of the assembled clusters can be regulated by the light intensity. A remarkably small number of the active colloids is sufficient to induce the assembly of the dynamic crystals. The approach produces rationally designed colloidal clusters and crystals with controllable sizes, shapes, and symmetries. This multicomponent active matter system offers the possibility of obtaining structures and assemblies that cannot be found in equilibrium systems.
中文翻译：
光活化胶体混合物的非平衡组装
人工活性物质系统表现出的集体现象为制造失衡的微型组件提供了新颖的途径。在这里，显示了被动二氧化硅胶体结晶为良好控制的2D组件的过程，这是由少量自行推进的活性胶体指导的。活性胶体是二氧化钛-二氧化硅Janus颗粒，当被紫外线照射时会被推动。吸引相互作用的强度以及由此组装的簇的程度可以通过光强度来调节。数量非常少的活性胶体足以诱导动态晶体的组装。该方法可产生合理设计的胶体团簇和晶体，并具有可控制的大小，形状和对称性。
更新日期：2017-06-20
中文翻译：
光活化胶体混合物的非平衡组装
人工活性物质系统表现出的集体现象为制造失衡的微型组件提供了新颖的途径。在这里，显示了被动二氧化硅胶体结晶为良好控制的2D组件的过程，这是由少量自行推进的活性胶体指导的。活性胶体是二氧化钛-二氧化硅Janus颗粒，当被紫外线照射时会被推动。吸引相互作用的强度以及由此组装的簇的程度可以通过光强度来调节。数量非常少的活性胶体足以诱导动态晶体的组装。该方法可产生合理设计的胶体团簇和晶体，并具有可控制的大小，形状和对称性。
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