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Asymmetry controlled dynamic behavior of autonomous chemiluminescent Janus microswimmers
Chemical Science ( IF 8.4 ) Pub Date : 2020-06-30 , DOI: 10.1039/d0sc02431g
Gerardo Salinas 1, 2, 3, 4, 5 , Alice L. Dauphin 1, 2, 3, 4, 5 , Silvia Voci 1, 2, 3, 4, 5 , Laurent Bouffier 1, 2, 3, 4, 5 , Neso Sojic 1, 2, 3, 4, 5 , Alexander Kuhn 1, 2, 3, 4, 5
Affiliation  

Asymmetrically modified Janus microparticles are presented as autonomous light emitting swimmers. The localized dissolution of hybrid magnesium/polymer objects allows combining chemiluminescence with the spontaneous production of H2 bubbles, and thus generating directed motion. These light-emitting microswimmers are synthesized by using a straightforward methodology based on bipolar electromilling, followed by indirect bipolar electrodeposition of an electrophoretic paint. An optimization of the experimental parameters enables in the first step the formation of well-defined isotropic or anisotropic Mg microparticles. Subsequently, they are asymmetrically modified by wireless deposition of an anodic paint. The degree of asymmetry of the resulting Janus particles can be fine-tuned, leading to a controlled directional motion due to anisotropic gas formation. This autonomous motion is coupled with the emission of bright orange light when Ru(bpy)32+ and S2O82− are present in the solution as chemiluminescent reagents. The light emission is based on an original process of interfacial redox-induced chemiluminescence, thus allowing an easy visualization of the swimmer trajectories.

中文翻译:

自主化学发光Janus微游泳者的不对称控制动力学行为

不对称改性的Janus微粒作为自主发光游泳者出现。杂化镁/聚合物物体的局部溶解可实现化学发光与H 2的自发结合气泡,从而产生定向运动。通过使用基于双极电磨的直接方法,然后通过间接双极电沉积电泳漆,可以合成这些发光微扫描器。实验参数的优化使第一步能够形成定义明确的各向同性或各向异性的Mg微粒。随后,通过无线沉积阳极涂料对它们进行不对称改性。可以对生成的Janus粒子的不对称度进行微调,由于形成了各向异性的气体,导致了受控的定向运动。当Ru(bpy)3 2+和S 2 O 8 2-时,这种自主运动与明亮的橙色光的发射有关。作为化学发光试剂存在于溶液中。发光基于界面氧化还原诱导的化学发光的原始过程,因此可以轻松观察游泳者的运动轨迹。
更新日期:2020-07-22
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